Iputthebunchladenwithbeastiesonasmalltable,intheshade,beforetheopenwindow。Soon,theexoduscommences,butslowlyandunsteadily。Therearehesitations,retrogressions,perpendicularfallsattheendofathread,ascentsthatbringthehangingSpiderupagain。Inshortmuchadoforapoorresult。
Asmatterscontinuetodrag,itoccurstome,ateleveno’clock,totakethebundleofbrush-woodswarmingwiththelittleSpiders,alleagertobeoff,andplaceitonthewindow-sill,intheglareofthesun。Afterafewminutesofheatandlight,thesceneassumesaverydifferentaspect。Theemigrantsruntothetopofthetwigs,bustleaboutactively。Itbecomesabewilderingrope-yard,wherethousandsoflegsaredrawingthehempfromthespinnerets。
Idonotseetheropesmanufacturedandsentfloatingatthemercyoftheair;butIguesstheirpresence。
ThreeorfourSpidersstartatatime,eachgoingherownwayindirectionsindependentofherneighbours’。Allaremovingupwards,allareclimbingsomesupport,ascanbeperceivedbythenimblemotionoftheirlegs。Moreover,theroadisvisiblebehindtheclimber,itisofdoublethickness,thankstoanaddedthread。
Then,atacertainheight,individualmovementceases。Thetinyanimalsoarsinspaceandshines,litupbythesun。Softlyitsways,thensuddenlytakesflight。
Whathashappened?Thereisaslightbreezeoutside。Thefloatingcablehassnappedandthecreaturehasgoneoff,borneonitsparachute。Iseeitdriftingaway,showing,likeaspotoflight,againstthedarkfoliageofthenearcypresses,somefortyfeetdistant。Itriseshigher,itcrossesoverthecypress-screen,itdisappears。Othersfollow,somehigher,somelower,hitherandthither。
Butthethronghasfinisheditspreparations;thehourhascometodisperseinswarms。Wenowsee,fromthecrestofthebrushwood,acontinuoussprayofstarters,whoshootuplikemicroscopicprojectilesandmountinaspreadingcluster。Intheend,itislikethebouquetatthefinishofapyrotechnicdisplay,thesheafofrocketsfiredsimultaneously。Thecomparisoniscorrectdowntothedazzlinglightitself。Flaminginthesunlikesomanygleamingpoints,thelittleSpidersarethesparksofthatlivingfirework。Whataglorioussend-off!Whatanentranceintotheworld!Clutchingitsaeronauticthread,theminutecreaturemountsinanapotheosis。
Soonerorlater,nearerorfarther,thefallcomes。Tolive,wehavetodescend,oftenverylow,alas!TheCrestedLarkcrumblesthemule-droppingsintheroadandthuspicksuphisfood,theoatengrainwhichhewouldneverfindbysoaringinthesky,histhroatswollenwithsong。Wehavetodescend;thestomach’sinexorableclaimsdemandit。TheSpiderling,therefore,touchesland。Gravity,temperedbytheparachute,iskindtoher。
Therestofherstoryescapesme。WhatinfinitelytinyMidgesdoesshecapturebeforepossessingthestrengthtostabherBee?Whatarethemethods,whatthewilesofatomcontendingwithatom?I
knownot。Weshallfindheragaininspring,grownquitelargeandcrouchingamongtheflowerswhencetheBeetakestoll。
CHAPTERIX:THEGARDENSPIDERS:BUILDINGTHEWEB
Thefowling-snareisoneofman’singeniousvillainies。Withlines,pegsandpoles,twolarge,earth-colourednetsarestretchedupontheground,onetotheright,theothertotheleftofabaresurface。Alongcord,pulled,attherightmoment,bythefowler,whohidesinabrushwoodhut,worksthemandbringsthemtogethersuddenly,likeapairofshutters。
Dividedbetweenthetwonetsarethecagesofthedecoy-birds——
LinnetsandChaffinches,GreenfinchesandYellowhammers,BuntingsandOrtolans——sharp-earedcreatureswhich,onperceivingthedistantpassageofaflockoftheirownkind,forthwithutterashortcallingnote。Oneofthem,theSambe,anirresistibletempter,hopsaboutandflapshiswingsinapparentfreedom。Abitoftwinefastenshimtohisconvict’sstake。When,wornwithfatigueanddrivendesperatebyhisvainattemptstogetaway,thesuffererliesdownflatandrefusestodohisduty,thefowlerisabletostimulatehimwithoutstirringfromhishut。Alongstringsetsinmotionalittleleverworkingonapivot。Raisedfromthegroundbythisdiabolicalcontrivance,thebirdflies,fallsdownandfliesupagainateachjerkofthecord。
Thefowlerwaits,inthemildsunlightoftheautumnmorning。
Suddenly,greatexcitementinthecages。TheChaffincheschirptheirrallying-cry:
’Pinck!Pinck!’
Thereissomethinghappeninginthesky。TheSambe,quick!Theyarecoming,thesimpletons;theyswoopdownuponthetreacherousfloor。Witharapidmovement,themaninambushpullshisstring。
Thenetscloseandthewholeflockiscaught。
Manhaswildbeast’sbloodinhisveins。Thefowlerhastenstotheslaughter。Withhisthumb,hestiflesthebeatingofthecaptives’
hearts,stavesintheirskulls。Thelittlebirds,somanypiteousheadsofgame,willgotomarket,strungindozensonawirepassedthroughtheirnostrils。
ForscoundrellyingenuitytheEpeira’snetcanbearcomparisonwiththefowler’s;itevensurpassesitwhen,onpatientstudy,themainfeaturesofitssupremeperfectionstandrevealed。WhatrefinementofartforamessofFlies!Nowhere,inthewholeanimalkingdom,hastheneedtoeatinspiredamorecunningindustry。Ifthereaderwillmeditateuponthedescriptionthatfollows,hewillcertainlysharemyadmiration。
Firstofall,wemustwitnessthemakingofthenet;wemustseeitconstructedandseeitagainandagain,fortheplanofsuchacomplexworkcanonlybegraspedinfragments。To-day,observationwillgiveusonedetail;to-morrow,itwillgiveusasecond,suggestingfreshpointsofview;asourvisitsmultiply,anewfactiseachtimeaddedtothesumtotaloftheacquireddata,confirmingthosewhichcomebeforeordirectingourthoughtsalongunsuspectedpaths。
Thesnow-ballrollingoverthecarpetofwhitegrowsenormous,howeverscantyeachfreshlayerbe。Evensowithtruthinobservationalscience:itisbuiltupoftriflespatientlygatheredtogether。And,whilethecollectingofthesetriflesmeansthatthestudentofSpiderindustrymustnotbecharyofhistime,atleastitinvolvesnodistantandspeculativeresearch。
ThesmallestgardencontainsEpeirae,allaccomplishedweavers。
Inmyenclosure,whichIhavestockedcarefullywiththemostfamousbreeds,Ihavesixdifferentspeciesunderobservation,allofausefulsize,allfirst-classspinners。TheirnamesaretheBandedEpeiraEpeirafasciata,WALCK。,theSilkyEpeiraE。
sericea,WALCK。,theAngularEpeiraE。angulata,WALCK。,thePale-tintedEpeiraE。pallida,OLIV。,theDiademEpeira,orCrossSpiderE。diadema,CLERK。,andtheCraterEpeiraE。cratera,WALCK。。
Iamable,attheproperhours,allthroughthefineseason,toquestionthem,towatchthematwork,nowthisone,anonthat,accordingtothechancesoftheday。WhatIdidnotseeveryplainlyyesterdayIcanseethenextday,underbetterconditions,andonanyofthefollowingdays,untilthephenomenonunderobservationisrevealedinallclearness。
Letusgoeveryevening,stepbystep,fromoneborderoftallrosemariestothenext。Shouldthingsmovetooslowly,wewillsitdownatthefootoftheshrubs,oppositetherope-yard,wherethelightfallsfavourably,andwatchwithunwearyingattention。Eachtripwillbegoodforafactthatfillssomegapintheideasalreadygathered。Toappointone’sself,inthisway,aninspectorofSpiders’webs,formanyyearsinsuccessionandforlongseasons,meansjoininganotovercrowdedprofession,Iadmit。
Heavenknows,itdoesnotenableonetoputmoneyby!Nomatter:
themeditativemindreturnsfromthatschoolfullysatisfied。
TodescribetheseparateprogressoftheworkinthecaseofeachofthesixEpeiraementionedwouldbeauselessrepetition:allsixemploythesamemethodsandweavesimilarwebs,saveforcertaindetailsthatshallbesetforthlater。Iwill,therefore,sumupintheaggregatetheparticularssuppliedbyoneorotherofthem。
Mysubjects,inthefirstinstance,areyoungandboastbutaslightcorporation,veryfarremovedfromwhatitwillbeinthelateautumn。Thebelly,thewalletcontainingtherope-works,hardlyexceedsapeppercorninbulk。Thisslendernessonthepartofthespinstressesmustnotprejudiceusagainsttheirwork:
thereisnoparitybetweentheirskillandtheiryears。TheadultSpiders,withtheirdisgracefulpaunches,candonobetter。
Moreover,thebeginnershaveoneverypreciousadvantagefortheobserver:theyworkbyday,workeveninthesun,whereastheoldonesweaveonlyatnight,atunseasonablehours。Thefirstshowusthesecretsoftheirloomswithoutmuchdifficulty;theothersconcealthemfromus。WorkstartsinJuly,acoupleofhoursbeforesunset。
Thespinstressesofmyenclosurethenleavetheirdaytimehiding-
places,selecttheirpostsandbegintospin,onehere,anotherthere。Therearemanyofthem;wecanchoosewhereweplease。Letusstopinfrontofthisone,whomwesurpriseintheactoflayingthefoundationsofthestructure。Withoutanyappreciableorder,sherunsabouttherosemary-hedge,fromthetipofonebranchtoanotherwithinthelimitsofsomeeighteeninches。Gradually,sheputsathreadinposition,drawingitfromherwire-millwiththecombsattachedtoherhind-legs。Thispreparatoryworkpresentsnoappearanceofaconcertedplan。TheSpidercomesandgoesimpetuously,asthoughatrandom;shegoesup,comesdown,goesupagain,divesdownagainandeachtimestrengthensthepointsofcontactwithintricatemooringsdistributedhereandthere。Theresultisascantyanddisorderedscaffolding。
Isdisorderedtheword?Perhapsnot。TheEpeira’seye,moreexperiencedinmattersofthissortthanmine,hasrecognizedthegenerallieoftheland;andtherope-fabrichasbeenerectedaccordingly:itisveryinaccurateinmyopinion,butverysuitablefortheSpider’sdesigns。Whatisitthatshereallywants?Asolidframetocontainthenetworkoftheweb。Theshapelessstructurewhichshehasjustbuiltfulfilsthedesiredconditions:itmarksoutaflat,freeandperpendiculararea。
Thisisallthatisnecessary。
Thewholework,forthatmatter,isnowsooncompleted;itisdonealloveragain,eachevening,fromtoptobottom,fortheincidentsofthechasedestroyitinanight。Thenetisasyettoodelicatetoresistthedesperatestrugglesofthecapturedprey。Ontheotherhand,theadults’net,whichisformedofstouterthreads,isadaptedtolastsometime;andtheEpeiragivesitamorecarefully-constructedframe-work,asweshallseeelsewhere。
Aspecialthread,thefoundationoftherealnet,isstretchedacrosstheareasocapriciouslycircumscribed。Itisdistinguishedfromtheothersbyitsisolation,itspositionatadistancefromanytwigthatmightinterferewithitsswayinglength。Itneverfailstohave,inthemiddle,athickwhitepoint,formedofalittlesilkcushion。Thisisthebeaconthatmarksthecentreofthefutureedifice,thepostthatwillguidetheEpeiraandbringorderintothewildernessoftwistsandturns。
Thetimehascometoweavethehunting-snare。TheSpiderstartsfromthecentre,whichbearsthewhitesign-post,and,runningalongthetransversalthread,hurriedlyreachesthecircumference,thatistosay,theirregularframeenclosingthefreespace。
Stillwiththesamesuddenmovement,sherushesfromthecircumferencetothecentre;shestartsagainbackwardsandforwards,makesfortheright,theleft,thetop,thebottom;shehoistsherselfup,divesdown,climbsupagain,runsdownandalwaysreturnstothecentrallandmarkbyroadsthatslantinthemostunexpectedmanner。Eachtime,aradiusorspokeislaid,here,there,orelsewhere,inwhatlookslikemaddisorder。
Theoperationissoerraticallyconductedthatittakesthemostunremittingattentiontofollowitatall。TheSpiderreachesthemarginoftheareabyoneofthespokesalreadyplaced。Shegoesalongthismarginforsomedistancefromthepointatwhichshelanded,fixesherthreadtotheframeandreturnstothecentrebythesameroadwhichshehasjusttaken。
Thethreadobtainedonthewayinabrokenline,partlyontheradiusandpartlyontheframe,istoolongfortheexactdistancebetweenthecircumferenceandthecentralpoint。Onreturningtothispoint,theSpideradjustsherthread,stretchesittothecorrectlength,fixesitandcollectswhatremainsonthecentralsignpost。Inthecaseofeachradiuslaid,thesurplusistreatedinthesamefashion,sothatthesignpostcontinuestoincreaseinsize。Itwasfirstaspeck;itisnowalittlepellet,orevenasmallcushionofacertainbreadth。
WeshallseepresentlywhatbecomesofthiscushionwhereontheSpider,thatniggardlyhousewife,layshersaved-upbitsofthread;
forthemoment,wewillnotethattheEpeiraworksitupwithherlegsafterplacingeachspoke,teazlesitwithherclaws,matsitintofeltwithnoteworthydiligence。Insodoing,shegivesthespokesasolidcommonsupport,somethinglikethehubofourcarriage-wheels。
Theeventualregularityoftheworksuggeststhattheradiiarespuninthesameorderinwhichtheyfigureintheweb,eachfollowingimmediatelyuponitsnextneighbour。Matterspassinanothermanner,whichatfirstlookslikedisorder,butwhichisreallyajudiciouscontrivance。Aftersettingafewspokesinonedirection,theEpeirarunsacrosstotheothersidetodrawsomeintheoppositedirection。Thesesuddenchangesofcoursearehighlylogical;theyshowushowproficienttheSpiderisinthemechanicsofrope-construction。Weretheytosucceedoneanotherregularly,thespokesofonegroup,havingnothingasyettocounteractthem,woulddistorttheworkbytheirstraining,wouldevendestroyitforlackofastablersupport。Beforecontinuing,itisnecessarytolayaconversegroupwhichwillmaintainthewholebyitsresistance。Anycombinationofforcesactinginonedirectionmustbeforthwithneutralizedbyanotherintheoppositedirection。
ThisiswhatourstaticsteachusandwhattheSpiderputsintopractice;sheisapastmistressofthesecretsofrope-building,withoutservinganapprenticeship。
Onewouldthinkthatthisinterruptedandapparentlydisorderedlabourmustresultinaconfusedpieceofwork。Wrong:theraysareequidistantandformabeautifully-regularorb。Theirnumberisacharacteristicmarkofthedifferentspecies。TheAngularEpeiraplaces21inherweb,theBandedEpeira32,theSilkyEpeira42。Thesenumbersarenotabsolutelyfixed;butthevariationisveryslight。
Nowwhichofuswouldundertake,off-hand,withoutmuchpreliminaryexperimentandwithoutmeasuring-instruments,todivideacircleintoagivenquantityofsectorsofequalwidth?TheEpeirae,thoughweightedwithawalletandtotteringonthreadsshakenbythewind,effectthedelicatedivisionwithoutstoppingtothink。
Theyachieveitbyamethodwhichseemsmadaccordingtoournotionsofgeometry。Outofdisordertheyevolveorder。
Wemustnot,however,givethemmorethantheirdue。Theanglesareonlyapproximatelyequal;theysatisfythedemandsoftheeye,butcannotstandthetestofstrictmeasurement。Mathematicalprecisionwouldbesuperfluoushere。Nomatter,weareamazedattheresultobtained。HowdoestheEpeiracometosucceedwithherdifficultproblem,sostrangelymanaged?Iamstillaskingmyselfthequestion。
Thelayingoftheradiiisfinished。TheSpidertakesherplaceinthecentre,onthelittlecushionformedoftheinauguralsign-postandthebitsofthreadleftover。Stationedonthissupport,sheslowlyturnsroundandround。Sheisengagedonadelicatepieceofwork。Withanextremelythinthread,shedescribesfromspoketospoke,startingfromthecentre,aspirallinewithveryclosecoils。Thecentralspacethusworkedattains,intheadults’webs,thedimensionsofthepalmofone’shand;intheyoungerSpiders’
webs,itismuchsmaller,butitisneverabsent。ForreasonswhichIwillexplaininthecourseofthisstudy,Ishallcallit,infuture,the’resting-floor。’
Thethreadnowbecomesthicker。Thefirstcouldhardlybeseen;
thesecondisplainlyvisible。TheSpidershiftsherpositionwithgreatslantingstrides,turnsafewtimes,movingfartherandfartherfromthecentre,fixesherlineeachtimetothespokewhichshecrossesandatlastcomestoastopattheloweredgeoftheframe。Shehasdescribedaspiralwithcoilsofrapidly-
increasingwidth。Theaveragedistancebetweenthecoils,eveninthestructuresoftheyoungEpeirae,isonecentimetre。{29}
Letusnotbemisledbytheword’spiral,’whichconveysthenotionofacurvedline。AllcurvesarebanishedfromtheSpiders’work;
nothingisusedbutthestraightlineanditscombinations。Allthatisaimedatisapolygonallinedrawninacurveasgeometryunderstandsit。Tothispolygonalline,aworkdestinedtodisappearastherealtoilsarewoven,Iwillgivethenameofthe’auxiliaryspiral。’Itsobjectistosupplycross-bars,supportingrungs,especiallyintheouterzone,wheretheradiiaretoodistantfromoneanothertoaffordasuitablegroundwork。ItsobjectisalsotoguidetheEpeiraintheextremelydelicatebusinesswhichsheisnowabouttoundertake。
But,beforethat,onelasttaskbecomesessential。Theareaoccupiedbythespokesisveryirregular,beingmarkedoutbythesupportsofthebranch,whichareinfinitelyvariable。Thereareangularnicheswhich,ifskirtedtooclosely,woulddisturbthesymmetryofthewebabouttobeconstructed。TheEpeiraneedsanexactspacewhereingraduallytolayherspiralthread。Moreover,shemustnotleaveanygapsthroughwhichherpreymightfindanoutlet。
Anexpertinthesematters,theSpidersoonknowsthecornersthathavetobefilledup。Withanalternatingmovement,firstinthisdirection,theninthat,shelays,uponthesupportoftheradii,athreadthatformstwoacuteanglesatthelateralboundariesofthefaultypartanddescribesazigzaglinenotwhollyunliketheornamentknownasthefret。
Thesharpcornershavenowbeenfilledwithfretsoneveryside;
thetimehascometoworkattheessentialpart,thesnaring-webforwhichalltherestisbutasupport。Clingingontheonehandtotheradii,ontheothertothechordsoftheauxiliaryspiral,theEpeiracoversthesamegroundaswhenlayingthespiral,butintheoppositedirection:formerly,shemovedawayfromthecentre;
nowshemovestowardsitandwithcloserandmorenumerouscircles。
Shestartsfromthebaseoftheauxiliaryspiral,neartheframe。
Whatfollowsisdifficulttoobserve,forthemovementsareveryquickandspasmodic,consistingofaseriesofsuddenlittlerushes,swaysandbendsthatbewildertheeye。Itneedscontinuousattentionandrepeatedexaminationtodistinguishtheprogressoftheworkhoweverslightly。
Thetwohind-legs,theweavingimplements,keepgoingconstantly。
Letusnamethemaccordingtotheirpositiononthework-floor。I
callthelegthatfacesthecentreofthecoil,whentheanimalmoves,the’innerleg;’theoneoutsidethecoilthe’outerleg。’
Thelatterdrawsthethreadfromthespinneretandpassesittotheinnerleg,which,withagracefulmovement,laysitontheradiuscrossed。Atthesametime,thefirstlegmeasuresthedistance;itgripsthelastcoilplacedinpositionandbringswithinasuitablerangethatpointoftheradiuswheretothethreadistobefixed。
Assoonastheradiusistouched,thethreadstickstoitbyitsownglue。Therearenoslowoperations,noknots:thefixingisdoneofitself。
Meanwhile,turningbynarrowdegrees,thespinstressapproachestheauxiliarychordsthathavejustservedashersupport。When,intheend,thesechordsbecometooclose,theywillhavetogo;theywouldimpairthesymmetryofthework。TheSpider,therefore,clutchesandholdsontotherungsofahigherrow;shepicksup,onebyone,asshegoesalong,thosewhichareofnomoreusetoherandgathersthemintoafine-spunballatthecontact-pointofthenextspoke。Hencearisesaseriesofsilkyatomsmarkingthecourseofthedisappearingspiral。
Thelighthastofallfavourablyforustoperceivethesespecks,theonlyremainsoftheruinedauxiliarythread。Onewouldtakethemforgrainsofdust,ifthefaultlessregularityoftheirdistributiondidnotremindusofthevanishedspiral。Theycontinue,stillvisible,untilthefinalcollapseofthenet。
AndtheSpider,withoutastopofanykind,turnsandturnsandturns,drawingnearertothecentreandrepeatingtheoperationoffixingherthreadateachspokewhichshecrosses。Agoodhalf-
hour,anhourevenamongthefull-grownSpiders,isspentonspiralcircles,tothenumberofaboutfiftyfortheweboftheSilkyEpeiraandthirtyforthoseoftheBandedandtheAngularEpeira。
Atlast,atsomedistancefromthecentre,onthebordersofwhatI
havecalledtheresting-floor,theSpiderabruptlyterminatesherspiralwhenthespacewouldstillallowofacertainnumberofturns。Weshallseethereasonofthissuddenstoppresently。
Next,theEpeira,nomatterwhich,youngorold,hurriedlyflingsherselfuponthelittlecentralcushion,pullsitoutandrollsitintoaballwhichIexpectedtoseethrownaway。Butno:herthriftynaturedoesnotpermitthiswaste。Sheeatsthecushion,atfirstaninaugurallandmark,thenaheapofbitsofthread;sheoncemoremeltsinthedigestivecruciblewhatisnodoubtintendedtoberestoredtothesilkentreasury。Itisatoughmouthful,difficultforthestomachtoelaborate;still,itispreciousandmustnotbelost。Theworkfinisheswiththeswallowing。Thenandthere,theSpiderinstalsherself,headdownwards,atherhunting-
postinthecentreoftheweb。
Theoperationwhichwehavejustseengivesrisetoareflection。
Menarebornright-handed。Thankstoalackofsymmetrythathasneverbeenexplained,ourrightsideisstrongerandreadierinitsmovementsthanourleft。Theinequalityisespeciallynoticeableinthetwohands。Ourlanguageexpressesthissupremacyofthefavouredsideinthetermsdexterity,adroitnessandaddress,allofwhichalludetotherighthand。
Istheanimal,onitsside,right-handed,left-handed,orunbiased?
WehavehadopportunitiesofshowingthattheCricket,theGrasshopperandmanyothersdrawtheirbow,whichisontherightwing-case,overthesoundingapparatus,whichisontheleftwing-
case。Theyareright-handed。
WhenyouandItakeanunpremeditatedturn,wespinroundonourrightheel。Theleftside,theweaker,movesonthepivotoftheright,thestronger。Inthesameway,nearlyalltheMolluscsthathavespiralshellsrolltheircoilsfromlefttoright。Amongthenumerousspeciesinbothlandandwaterfauna,onlyaveryfewareexceptionalandturnfromrighttoleft。
Itwouldbeinterestingtotryandworkouttowhatextentthatpartofthezoologicalkingdomwhichboastsatwo-sidedstructureisdividedintoright-handedandleft-handedanimals。Candissymetry,thatsourceofcontrasts,beageneralrule?Orarethereneutrals,endowedwithequalpowersofskillandenergyonbothsides?Yes,thereare;andtheSpiderisoneofthem。Sheenjoystheveryenviableprivilegeofpossessingaleftsidewhichisnolesscapablethantheright。Sheisambidextrous,aswitnessthefollowingobservations。
Whenlayinghersnaring-thread,everyEpeiraturnsineitherdirectionindifferently,asaclosewatchwillprove。Reasonswhosesecretescapesusdeterminethedirectionadopted。Oncethisortheothercourseistaken,thespinstressdoesnotchangeit,evenafterincidentsthatsometimesoccurtodisturbtheprogressofthework。ItmayhappenthataGnatgetscaughtinthepartalreadywoven。TheSpiderthereuponabruptlyinterruptsherlabours,hastensuptotheprey,bindsitandthenreturnstowhereshestoppedandcontinuesthespiralinthesameorderasbefore。
Atthecommencementofthework,gyrationinonedirectionbeingemployedaswellasgyrationintheother,weseethat,whenmakingherrepeatedwebs,thesameEpeiraturnsnowherrightside,nowherlefttothecentreofthecoil。Well,aswehavesaid,itisalwayswiththeinnerhind-leg,thelegnearerthecentre,thatistosay,insomecasestherightandinsomecasestheleftleg,thatsheplacesthethreadinposition,anexceedinglydelicateoperationcallingforthedisplayofexquisiteskill,becauseofthequicknessoftheactionandtheneedforpreservingstrictlyequaldistances。Anyoneseeingthislegworkingwithsuchextremeprecision,therightlegto-day,thelefttomorrow,becomesconvincedthattheEpeiraishighlyambidextrous。
CHAPTERX:THEGARDENSPIDERS:MYNEIGHBOUR
AgedoesnotmodifytheEpeira’stalentinanyessentialfeature。
Astheyoungworked,sodotheold,thericherbyayear’sexperience。Therearenomastersnorapprenticesintheirguild;
allknowtheircraftfromthemomentthatthefirstthreadislaid。
Wehavelearntsomethingfromthenovices:letusnowlookintothematteroftheireldersandseewhatadditionaltasktheneedsofageimposeuponthem。
JulycomesandgivesmeexactlywhatIwishfor。Whilethenewinhabitantsaretwistingtheirropesontherosemariesintheenclosure,oneevening,bythelastgleamsoftwilight,IdiscoverasplendidSpider,withamightybelly,justoutsidemydoor。Thisoneisamatron;shedatesbacktolastyear;hermajesticcorpulence,soexceptionalatthisseason,proclaimsthefact。I
knowherfortheAngularEpeiraEpeiraangulata,WALCK。,cladingreyandgirdledwithtwodarkstripesthatmeetinapointattheback。Thebaseofherabdomenswellsintoashortnippleoneitherside。
Thisneighbourwillcertainlyservemyturn,providedthatshedonotworktoolateatnight。Thingsbodewell:Icatchthebuxomoneintheactoflayingherfirstthreads。Atthisratemysuccessneednotbewonattheexpenseofsleep。And,infact,I
amable,throughoutthemonthofJulyandthegreaterpartofAugust,fromeighttoteno’clockintheevening,towatchtheconstructionoftheweb,whichismoreorlessruinednightlybytheincidentsofthechaseandbuiltupagain,nextday,whentooseriouslydilapidated。
Duringthetwostiflingmonths,whenthelightfailsandaspellofcoolnessfollowsuponthefurnace-heatoftheday,itiseasyforme,lanterninhand,towatchmyneighbour’svariousoperations。
Shehastakenupherabode,ataconvenientheightforobservation,betweenarowofcypress-treesandaclumpoflaurels,neartheentrancetoanalleyhauntedbyMoths。Thespotappearswell-
chosen,fortheEpeiradoesnotchangeitthroughouttheseason,thoughsherenewshernetalmosteverynight。
Punctuallyasdarknessfalls,ourwholefamilygoesandcallsuponher。Bigandlittle,westandamazedatherwealthofbellyandherexuberantsomersaultsinthemazeofquiveringropes;weadmirethefaultlessgeometryofthenetasitgraduallytakesshape。Allagleaminthelantern-light,theworkbecomesafairyorb,whichseemswovenofmoonbeams。
ShouldIlinger,inmyanxietytoclearupcertaindetails,thehousehold,whichbythistimeisinbed,waitsformyreturnbeforegoingtosleep:
’Whathasshebeendoingthisevening?’Iamasked。’Hasshefinishedherweb?HasshecaughtaMoth?’
Idescribewhathashappened。To-morrow,theywillbeinalesshurrytogotobed:theywillwanttoseeeverything,totheveryend。Whatdelightful,simpleeveningswehavespentlookingintotheSpider’sworkshop!
ThejournaloftheAngularEpeira,writtenupdaybyday,teachesus,firstofall,howsheobtainstheropesthatformtheframe-
workofthebuilding。Alldayinvisible,crouchingamidthecypress-leaves,theSpider,atabouteighto’clockintheevening,solemnlyemergesfromherretreatandmakesforthetopofabranch。Inthisexaltedposition,shesitsforsometimelayingherplanswithdueregardtothelocality;sheconsultstheweather,ascertainsifthenightwillbefine。Then,suddenly,withhereightlegswide-spread,sheletsherselfdropstraightdown,hangingtothelinethatissuesfromherspinnerets。Justastherope-makerobtainstheevenoutputofhishempbywalkingbackwards,sodoestheEpeiraobtainthedischargeofhersbyfalling。Itisextractedbytheweightofherbody。
Thedescent,however,hasnotthebrutespeedwhichtheforceofgravitywouldgiveit,ifuncontrolled。Itisgovernedbytheactionofthespinnerets,whichcontractorexpandtheirpores,orclosethementirely,atthefaller’spleasure。Andso,withgentlemoderationshepaysoutthislivingplumb-line,ofwhichmylanternclearlyshowsmetheplumb,butnotalwaystheline。Thegreatsquabseemsatsuchtimestobesprawlinginspace,withouttheleastsupport。
Shecomestoanabruptstoptwoinchesfromtheground;thesilk-
reelceasesworking。TheSpiderturnsround,clutchesthelinewhichshehasjustobtainedandclimbsupbythisroad,stillspinning。But,thistime,assheisnolongerassistedbytheforceofgravity,thethreadisextractedinanothermanner。Thetwohind-legs,withaquickalternateaction,drawitfromthewalletandletitgo。
Onreturningtoherstarting-point,ataheightofsixfeetormore,theSpiderisnowinpossessionofadoubleline,bentintoaloopandfloatinglooselyinacurrentofair。Shefixesherendwhereitsuitsherandwaitsuntiltheotherend,waftedbythewind,hasfasteneditslooptotheadjacenttwigs。
Thedesiredresultmaybeveryslowincoming。ItdoesnottiretheunfailingpatienceoftheEpeira,butitsoonwearsoutmine。
AndithashappenedtomesometimestocollaboratewiththeSpider。
Ipickupthefloatingloopwithastrawandlayitonabranch,ataconvenientheight。Thefoot-bridgeerectedwithmyassistanceisconsideredsatisfactory,justasthoughthewindhadplacedit。I
countthiscollaborationamongthegoodactionsstandingtomycredit。
Feelingherthreadfixed,theEpeirarunsalongitrepeatedly,fromendtoend,addingafibretoitoneachjourney。WhetherIhelpornot,thisformsthe’suspension-cable,’themainpieceoftheframe-work。Icallitacable,inspiteofitsextremethinness,becauseofitsstructure。Itlooksasthoughitweresingle,but,atthetwoends,itisseentodivideandspread,tuft-wise,intonumerousconstituentparts,whicharetheproductofasmanycrossings。Thesedivergingfibres,withtheirseveralcontact-
points,increasethesteadinessofthetwoextremities。
Thesuspension-cableisincomparablystrongerthantherestoftheworkandlastsforanindefinitetime。Thewebisgenerallyshatteredafterthenight’shuntingandisnearlyalwaysrewovenonthefollowingevening。Aftertheremovalofthewreckage,itismadealloveragain,onthesamesite,clearedofeverythingexceptthecablefromwhichthenewnetworkistohang。
Thelayingofthiscableisasomewhatdifficultmatter,becausethesuccessoftheenterprisedoesnotdependupontheanimal’sindustryalone。Ithastowaituntilabreezecarriesthelinetothepier-headinthebushes。Sometimes,acalmprevails;
sometimes,thethreadcatchesatanunsuitablepoint。Thisinvolvesgreatexpenditureoftime,withnocertaintyofsuccess。
Andso,whenoncethesuspension-cableisinbeing,wellandsolidlyplaced,theEpeiradoesnotchangeit,exceptoncriticaloccasions。Everyevening,shepassesandrepassesoverit,strengtheningitwithfreshthreads。
WhentheEpeiracannotmanageafallofsufficientdepthtogiveherthedoublelinewithitslooptobefixedatadistance,sheemploysanothermethod。Sheletsherselfdownandthenclimbsupagain,aswehavealreadyseen;but,thistime,thethreadendssuddenlyinafilmyhair-pencil,atuft,whosepartsremaindisjoined,justastheycomefromthespinneret’srose。Thenthissortofbushyfox’sbrushiscutshort,asthoughwithapairofscissors,andthewholethread,whenunfurled,doublesitslength,whichisnowenoughforthepurpose。ItisfastenedbytheendjoinedtotheSpider;theotherfloatsintheair,withitsspreadingtuft,whicheasilytanglesinthebushes。EvensomusttheBandedEpeiragotoworkwhenshethrowsherdaringsuspension-
bridgeacrossastream。
Oncethecableislaid,inthiswayorinthat,theSpiderisinpossessionofabasethatallowshertoapproachorwithdrawfromtheleafypiersatwill。Fromtheheightofthecable,theupperboundaryoftheprojectedworks,sheletsherselfsliptoaslightdepth,varyingthepointsofherfall。Sheclimbsupagainbythelineproducedbyherdescent。TheresultoftheoperationisadoublethreadwhichisunwoundwhiletheSpiderwalksalongherbigfoot-bridgetothecontact-branch,whereshefixesthefreeendofherthreadmoreorlesslowdown。Inthisway,sheobtains,torightandleft,afewslantingcross-bars,connectingthecablewiththebranches。
Thesecross-bars,intheirturn,supportothersinever-changingdirections。Whenthereareenoughofthem,theEpeiraneednolongerresorttofallsinordertoextractherthreads;shegoesfromonecordtothenext,alwayswire-drawingwithherhind-legsandplacingherproduceinpositionasshegoes。Thisresultsinacombinationofstraightlinesowningnoorder,savethattheyarekeptinone,nearlyperpendicularplane。Theymarkaveryirregularpolygonalarea,whereintheweb,itselfaworkofmagnificentregularity,shallpresentlybewoven。
Itisunnecessarytogoovertheconstructionofthemasterpieceagain;theyoungerSpidershavetaughtusenoughinthisrespect。
Inbothcases,weseethesameequidistantradiilaid,withacentrallandmarkforaguide;thesameauxiliaryspiral,thescaffoldingoftemporaryrungs,soondoomedtodisappear;thesamesnaring-spiral,withitsmazeofclosely-wovencoils。Letuspasson:otherdetailscallforourattention。
Thelayingofthesnaring-spiralisanexceedinglydelicateoperation,becauseoftheregularityofthework。Iwasbentuponknowingwhether,ifsubjectedtothedinofunaccustomedsounds,theSpiderwouldhesitateandblunder。Doessheworkimperturbably?Ordoessheneedundisturbedquiet?Asitis,I
knowthatmypresenceandthatofmylighthardlytroubleheratall。Thesuddenflashesemittedbymylanternhavenopowertodistractherfromhertask。Shecontinuestoturninthelightevenassheturnedinthedark,neitherfasternorslower。ThisisagoodomenfortheexperimentwhichIhaveinview。
ThefirstSundayinAugustisthefeastofthepatronsaintofthevillage,commemoratingtheFindingofSt。Stephen。ThisisTuesday,thethirddayoftherejoicings。Therewillbefireworksto-night,atnineo’clock,toconcludethemerry-makings。Theywilltakeplaceonthehigh-roadoutsidemydoor,atafewstepsfromthespotwheremySpiderisworking。Thespinstressisbusyuponhergreatspiralattheverymomentwhenthevillagebig-wigsarrivewithtrumpetanddrumandsmallboyscarryingtorches。
Moreinterestedinanimalpsychologythaninpyrotechnicaldisplays,IwatchtheEpeira’sdoings,lanterninhand。Thehullabalooofthecrowd,thereportsofthemortars,thecrackleofRomancandlesburstinginthesky,thehissoftherockets,therainofsparks,thesuddenflashesofwhite,redorbluelight:
noneofthisdisturbstheworker,whomethodicallyturnsandturnsagain,justasshedoesinthepeaceofordinaryevenings。
Oncebefore,thegunwhichIfiredundertheplane-treesfailedtotroubletheconcertoftheCicadae;to-day,thedazzlinglightofthefire-wheelsandthesplutterofthecrackersdonotavailtodistracttheSpiderfromherweaving。And,afterall,whatdifferencewoulditmaketomyneighbouriftheworldfellin!Thevillagecouldbeblownupwithdynamite,withoutherlosingherheadforsuchatrifle。Shewouldcalmlygoonwithherweb。
LetusreturntotheSpidermanufacturinghernetundertheusualtranquilconditions。Thegreatspiralhasbeenfinished,abruptly,ontheconfinesoftheresting-floor。Thecentralcushion,amatofendsofsavedthread,isnextpulledupandeaten。But,beforeindulginginthismouthful,whichclosestheproceedings,twoSpiders,theonlytwooftheorder,theBandedandtheSilkyEpeira,havestilltosigntheirwork。Abroad,whiteribbonislaid,inathickzigzag,fromthecentretotheloweredgeoftheorb。Sometimes,butnotalways,asecondbandofthesameshapeandoflesserlengthoccupiestheupperportion,oppositethefirst。
Iliketolookupontheseoddflourishesasconsolidating-gear。Tobeginwith,theyoungEpeiraeneverusethem。Forthemoment,heedlessofthefutureandlavishoftheirsilk,theyremaketheirwebnightly,eventhoughitbenonetoomuchdilapidatedandmightwellserveagain。Abrand-newsnareatsunsetistherulewiththem。Andthereislittleneedforincreasedsoliditywhentheworkhastobedoneagainonthemorrow。
Ontheotherhand,inthelateautumn,thefull-grownSpiders,feelinglaying-timeathand,aredriventopractiseeconomy,inviewofthegreatexpenditureofsilkrequiredfortheegg-bag。
Owingtoitslargesize,thenetnowbecomesacostlyworkwhichitwerewelltouseaslongaspossible,forfearoffindingone’sreservesexhaustedwhenthetimecomesfortheexpensiveconstructionofthenest。Forthisreason,orforotherswhichescapeme,theBandedandtheSilkyEpeiraethinkitwisetoproducedurableworkandtostrengthentheirtoilswithacross-
ribbon。TheotherEpeirae,whoareputtolessexpenseinthefabricationoftheirmaternalwallet——amerepill——areunacquaintedwiththezigzagbinderand,liketheyoungerSpiders,reconstructtheirwebalmostnightly。
Myfatneighbour,theAngularEpeira,consultedbythelightofalantern,shalltellushowtherenewalofthenetproceeds。Asthetwilightfades,shecomesdowncautiouslyfromherday-dwelling;
sheleavesthefoliageofthecypressesforthesuspension-cableofhersnare。Hereshestandsforsometime;then,descendingtoherweb,shecollectsthewreckageingreatarmfuls。Everything——
spiral,spokesandframe——israkedupwithherlegs。Onethingaloneissparedandthatisthesuspension-cable,thesturdypieceofworkthathasservedasafoundationforthepreviousbuildingsandwillserveforthenewafterreceivingafewstrengtheningrepairs。
ThecollectedruinsformapillwhichtheSpiderconsumeswiththesamegreedthatshewouldshowinswallowingherprey。Nothingremains。ThisisthesecondinstanceoftheSpiders’supremeeconomyoftheirsilk。Wehaveseenthem,afterthemanufactureofthenet,eatingthecentralguide-post,amodestmouthful;wenowseethemgobblingupthewholeweb,ameal。Refinedandturnedintofluidbythestomach,thematerialsoftheoldnetwillserveforotherpurposes。
Asgoonasthesiteisthoroughlycleared,theworkoftheframeandthenetbeginsonthesupportofthesuspension-cablewhichwasrespected。Woulditnotbesimplertorestoretheoldweb,whichmightservemanytimesyet,ifafewrentswerejustrepaired?Onewouldsayso;butdoestheSpiderknowhowtopatchherwork,asathriftyhousewifedarnsherlinen?Thatisthequestion。
Tomendseveredmeshes,toreplacebrokenthreads,toadjustthenewtotheold,inshort,torestoretheoriginalorderbyassemblingthewreckagewouldbeafar-reachingfeatofprowess,averyfineproofofgleamsofintelligence,capableofperformingrationalcalculations。Ourmendersexcelinthisclassofwork。
Theyhaveastheirguidetheirsense,whichmeasurestheholes,cutsthenewpiecetosizeandfitsitintoitsproperplace。DoestheSpiderpossessthecounterpartofthishabitofclearthinking?
Peopledeclareasmuch,without,apparently,lookingintothematterveryclosely。Theyseemabletodispensewiththeconscientiousobserver’sscruples,wheninflatingtheirbladderoftheory。Theygostraightahead;andthatisenough。Asforourselves,lessgreatlydaring,wewillfirstenquire;wewillseebyexperimentiftheSpiderreallyknowshowtorepairherwork。
TheAngularEpeira,thatnearneighbourwhohasalreadysuppliedmewithsomanydocuments,hasjustfinishedherweb,atnineo’clockintheevening。Itisasplendidnight,calmandwarm,favourabletotheroundsoftheMoths。Allpromisesgoodhunting。Atthemomentwhen,aftercompletingthegreatspiral,theEpeiraisabouttoeatthecentralcushionandsettledownuponherresting-floor,Icutthewebintwo,diagonally,withapairofsharpscissors。
Thesaggingofthespokes,deprivedoftheircounter-agents,producesanemptyspace,wideenoughforthreefingerstopassthrough。
TheSpiderretreatstohercableandlooksonwithoutbeinggreatlyfrightened。WhenIhavedone,shequietlyreturns。Shetakesherstandononeofthehalves,atthespotwhichwasthecentreoftheoriginalorb;but,asherlegsfindnofootingononeside,shesoonrealizesthatthesnareisdefective。Thereupon,twothreadsarestretchedacrossthebreach,twothreads,nomore;thelegsthatlackedafootholdspreadacrossthem;andhenceforththeEpeiramovesnomore,devotingherattentiontotheincidentsofthechase。
WhenIsawthosetwothreadslaid,joiningtheedgesoftherent,I
begantohopethatIwastowitnessamending-process:
’TheSpider,’saidItomyself,’willincreasethenumberofthosecross-threadsfromendtoendofthebreach;and,thoughtheaddedpiecemaynotmatchtherestofthework,atleastitwillfillthegapandthecontinuoussheetwillbeofthesameusepracticallyastheregularweb。’
Therealitydidnotanswertomyexpectation。Thespinstressmadenofurtherendeavourallnight。Shehuntedwithherrivennet,forwhatitwasworth;forIfoundthewebnextmorninginthesameconditionwhereinIhadleftitonthenightbefore。Therehadbeennomendingofanykind。
Thetwothreadsstretchedacrossthebreachevenmustnotbetakenforanattemptatrepairing。Findingnofootholdforherlegsononeside,theSpiderwenttolookintothestateofthingsand,insodoing,crossedtherent。Ingoingandreturning,sheleftathread,asisthecustomwithalltheEpeiraewhenwalking。Itwasnotadeliberatemending,butthemereresultofanuneasychangeofplace。
Perhapsthesubjectofmyexperimentthoughtitunnecessarytogotofreshtroubleandexpense,forthewebcanservequitewellasitis,aftermyscissor-cut:thetwohalvestogetherrepresenttheoriginalsnaring-surface。AllthattheSpider,seatedinacentralposition,needdoistofindtherequisitesupportforherspreadlegs。Thetwothreadsstretchedfromsidetosideofthecleftsupplyherwiththis,ornearly。Mymischiefdidnotgofarenough。Letusdevisesomethingbetter。
Nextday,thewebisrenewed,aftertheoldonehasbeenswallowed。
WhentheworkisdoneandtheEpeiraseatedmotionlessathercentralpost,Itakeastrawand,wieldingitdexterously,soastorespecttheresting-floorandthespokes,Ipullandrootupthespiral,whichdanglesintatters。Withitssnaring-threadsruined,thenetisuseless;nopassingMothwouldallowherselftobecaught。NowwhatdoestheEpeiradointhefaceofthisdisaster?
Nothingatall。Motionlessonherresting-floor,whichIhaveleftintact,sheawaitsthecaptureofthegame;sheawaitsitallnightinvainonherimpotentweb。Inthemorning,IfindthesnareasI
leftit。Necessity,themotherofinvention,hasnotpromptedtheSpidertomakeaslightrepairinherruinedtoils。
Possiblythisisaskingtoomuchofherresources。Thesilk-glandsmaybeexhaustedafterthelayingofthegreatspiral;andtorepeatthesameexpenditureimmediatelyisoutofthequestion。I
wantacasewhereintherecouldbenoappealtoanysuchexhaustion。Iobtainit,thankstomyassiduity。
WhileIamwatchingtherollingofthespiral,aheadofgamerushesfuntiltintotheunfinishedsnare。TheEpeirainterruptsherwork,hurriestothegiddy-pate,swatheshimandtakesherfillofhimwherehelies。Duringthestruggle,asectionofthewebhastornundertheweaver’sveryeyes。Agreatgapendangersthesatisfactoryworkingofthenet。Whatwillthespiderdointhepresenceofthisgrievousrent?
Noworneveristhetimetorepairthebrokenthreads:theaccidenthashappenedthisverymoment,betweentheanimal’slegs;
itiscertainlyknownand,moreover,therope-worksareinfullswing。Thistimethereisnoquestionoftheexhaustionofthesilk-warehouse。
Well,undertheseconditions,sofavourabletodarning,theEpeiradoesnomendingatall。Sheflingsasideherprey,aftertakingafewsipsatit,andresumesherspiralatthepointwheresheinterruptedittoattacktheMoth。Thetornpartremainsasitis。
Themachine-shuttleinourloomsdoesnotreverttothespoiledfabric;evensowiththeSpiderworkingatherweb。
Andthisisnocaseofdistraction,ofindividualcarelessness;allthelargespinstressessufferfromasimilarincapacityforpatching。TheBandedEpeiraandtheSilkyEpeiraarenoteworthyinthisrespect。TheAngularEpeiraremakesherwebnearlyeveryevening;theothertworeconstructtheirsonlyveryseldomandusethemevenwhenextremelydilapidated。Theygoonhuntingwithshapelessrags。Beforetheybringthemselvestoweaveanewweb,theoldonehastoberuinedbeyondrecognition。Well,Ihaveoftennotedthestateofoneoftheseruinsand,thenextmorning,Ihavefounditasitwas,orevenmoredilapidated。Neveranyrepairs;never;never。Iamsorry,becauseofthereputationwhichourhard-pressedtheoristshavegivenher,buttheSpiderisabsolutelyunabletomendherwork。Inspiteofherthoughtfulappearance,theEpeiraisincapableofthemodicumofreflexionrequiredtoinsertapieceintoanaccidentalgap。
OtherSpidersareunacquaintedwithwide-meshednetsandweavesatinswhereinthethreads,crossingatrandom,formacontinuoussubstance。AmongthisnumberistheHouseSpiderTegenariadomestica,LIN。。Inthecornersofourrooms,shestretcheswidewebsfixedbyangularextensions。Thebest-protectednookatonesidecontainstheowner’ssecretapartment。Itisasilktube,agallerywithaconicalopening,whencetheSpider,shelteredfromtheeye,watchesevents。Therestofthefabric,whichexceedsourfinestmuslinsindelicacy,isnot,properlyspeaking,ahunting-
implement:itisaplatformwhereontheSpider,attendingtotheaffairsofherestate,goesherrounds,especiallyatnight。Therealtrapconsistsofaconfusionoflinesstretchedabovetheweb。
Thesnare,constructedaccordingtootherrulesthaninthecaseoftheEpeirae,alsoworksdifferently。Herearenoviscousthreads,butplaintoils,renderedinvisiblebytheverynumber。IfaGnatrushintotheperfidiousentanglement,heiscaughtatonce;andthemorehestrugglesthemorefirmlyishebound。Thesnarelingfallsonthesheet-web。Tegenariahastensupandbiteshimintheneck。
Havingsaidthis,letusexperimentalittle。IntheweboftheHouseSpider,Imakearoundhole,twofingerswide。Theholeremainsyawningalldaylong;butnextmorningitisinvariablyclosed。Anextremelythingauzecoversthebreach,thedarkappearanceofwhichcontrastswiththedensewhitenessofthesurroundingfabric。Thegauzeissodelicatethat,tomakesureofitspresence,Iuseastrawratherthanmyeyes。Themovementoftheweb,whenthispartistouched,provesthepresenceofanobstacle。
Here,thematterwouldappearobvious。TheHouseSpiderhasmendedherworkduringthenight;shehasputapatchinthetornstuff,atalentunknowntotheGardenSpiders。Itwouldbegreatlytohercredit,ifamereattentivestudydidnotleadtoanotherconclusion。
TheweboftheHouseSpideris,asweweresaying,aplatformforwatchingandexploring;itisalsoasheetintowhichtheinsectscaughtintheoverheadriggingfall。Thissurface,adomainsubjecttounlimitedshocks,isneverstrongenough,especiallyasitisexposedtotheadditionalburdenoflittlebitsofplasterloosenedfromthewall。Theownerisconstantlyworkingatit;sheaddsanewlayernightly。
Everytimethatsheissuesfromhertubularretreatorreturnstoit,shefixesthethreadthathangsbehindherupontheroadcovered。Asevidenceofthiswork,wehavethedirectionofthesurface-lines,allofwhich,whetherstraightorwinding,accordingtothefanciesthatguidetheSpider’spath,convergeupontheentranceofthetube。Eachsteptaken,beyondadoubt,addsafilamenttotheweb。
WehaveherethestoryoftheProcessionaryofthePine,{30}whosehabitsIhaverelatedelsewhere。Whenthecaterpillarsleavethesilkpouch,togoandbrowseatnight,andalsowhentheyenteritagain,theyneverfailtospinalittleonthesurfaceoftheirnest。Eachexpeditionaddstothethicknessofthewall。
WhenmovingthiswayorthatuponthepursewhichIhavesplitfromtoptobottomwithmyscissors,theProcessionariesupholsterthebreachevenastheyupholstertheuntouchedpart,withoutpayingmoreattentiontoitthantotherestofthewall。Caringnothingabouttheaccident,theybehaveinthesamewayasonanon-gutteddwelling。Thecreviceisclosed,incourseoftime,notintentionally,butsolelybytheactionoftheusualspinning。
WearriveatthesameconclusiononthesubjectoftheHouseSpider。Walkingaboutherplatformeverynight,shelaysfreshcourseswithoutdrawingadistinctionbetweenthesolidandthehollow。Shehasnotdeliberatelyputapatchinthetorntexture;
shehassimplygoneonwithherordinarybusiness。Ifithappenthattheholeiseventuallyclosed,thisfortunateresultistheoutcomenotofaspecialpurpose,butofanunvaryingmethodofwork。
Besides,itisevidentthat,iftheSpiderreallywishedtomendherweb,allherendeavourswouldbeconcentratedupontherent。
Shewoulddevotetoitallthesilkatherdisposalandobtaininonesittingapieceveryliketherestoftheweb。Insteadofthat,whatdowefind?Almostnothing:ahardlyvisiblegauze。
Thethingisobvious:theSpiderdidonthatrentwhatshedideveryelsewhere,neithermorenorless。Farfromsquanderingsilkuponit,shesavedhersilksoastohaveenoughforthewholeweb。
Thegapwillbebettermended,littlebylittle,afterwards,asthesheetisstrengthenedalloverwithnewlayers。Andthiswilltakelong。Twomonthslater,thewindow——mywork——stillshowsthroughandmakesadarkstainagainstthedead-whiteofthefabric。
Neitherweaversnorspinners,therefore,knowhowtorepairtheirwork。Thosewonderfulmanufacturersofsilk-stuffslacktheleastglimmerofthatsacredlamp,reason,whichenablesthestupidestofdarning-womentomendtheheelofanoldstocking。TheofficeofinspectorofSpiders’webswouldhaveitsuses,evenifitmerelysucceededinriddingusofamistakenandmischievousidea。
CHAPTERXI:THEGARDENSPIDERS:THELIME-SNARE
ThespiralnetworkoftheEpeiraepossessescontrivancesoffearsomecunning。LetusgiveourattentionbypreferencetothatoftheBandedEpeiraorthatoftheSilkyEpeira,bothofwhichcanbeobservedatearlymorninginalltheirfreshness。
Thethreadthatformsthemisseenwiththenakedeyetodifferfromthatoftheframeworkandthespokes。Itglittersinthesun,looksasthoughitwereknottedandgivestheimpressionofachapletofatoms。Toexamineitthroughthelensonthewebitselfisscarcelyfeasible,becauseoftheshakingofthefabric,whichtremblesattheleastbreath。Bypassingasheetofglassunderthewebandliftingit,Itakeawayafewpiecesofthreadtostudy,piecesthatremainfixedtotheglassinparallellines。
Lensandmicroscopecannowplaytheirpart。
Thesightisperfectlyastounding。Thosethreads,ontheborderlandbetweenthevisibleandtheinvisible,areverycloselytwistedtwine,similartothegoldcordofourofficers’sword-
knots。Moreover,theyarehollow。Theinfinitelyslenderisatube,achannelfullofaviscousmoistureresemblingastrongsolutionofgumarabic。Icanseeadiaphanoustrailofthismoisturetricklingthroughthebrokenends。Underthepressureofthethinglassslidethatcoversthemonthestageofthemicroscope,thetwistslengthenout,becomecrinkledribbons,traversedfromendtoend,throughthemiddle,byadarkstreak,whichistheemptycontainer。
Thefluidcontentsmustoozeslowlythroughthesideofthosetubularthreads,rolledintotwistedstrings,andthusrenderthenetworksticky。Itissticky,infact,andinsuchawayastoprovokesurprise。Ibringafinestrawflatdownuponthreeorfourrungsofasector。Howevergentlethecontact,adhesionisatonceestablished。WhenIliftthestraw,thethreadscomewithitandstretchtotwiceorthreetimestheirlength,likeathreadofIndia-rubber。Atlast,whenover-taut,theyloosenwithoutbreakingandresumetheiroriginalform。Theylengthenbyunrollingtheirtwist,theyshortenbyrollingitagain;lastly,theybecomeadhesivebytakingtheglazeofthegummymoisturewherewiththeyarefilled。
Inshort,thespiralthreadisacapillarytubefinerthananythatourphysicswilleverknow。Itisrolledintoatwistsoastopossessanelasticitythatallowsit,withoutbreaking,toyieldtothetugsofthecapturedprey;itholdsasupplyofstickymatterinreserveinitstube,soastorenewtheadhesivepropertiesofthesurfacebyincessantexudation,astheybecomeimpairedbyexposuretotheair。Itissimplymarvellous。
TheEpeirahuntsnotwithsprings,butwithlime-snares。Andsuchlime-snares!Everythingiscaughtinthem,downtothedandelion-
plumethatbarelybrushesagainstthem。Nevertheless,theEpeira,whoisinconstanttouchwithherweb,isnotcaughtinthem。Why?
LetusfirstofallrememberthattheSpiderhascontrivedforherself,inthemiddleofhertrap,afloorinwhoseconstructionthestickyspiralthreadplaysnopart。Wesawhowthisthreadstopssuddenlyatsomedistancefromthecentre。Thereishere,coveringaspacewhich,inthelargerwebs,isaboutequaltothepalmofone’shand,afabricformedofspokesandofthecommencementoftheauxiliaryspiral,aneutralfabricinwhichtheexploringstrawfindsnoadhesivenessanywhere。
Here,onthiscentralresting-floor,andhereonly,theEpeiratakesherstand,waitingwholedaysforthearrivalofthegame。
Howeverclose,howeverprolongedhercontactwiththisportionoftheweb,sherunsnoriskofstickingtoit,becausethegummycoatingislacking,asisthetwistedandtubularstructure,throughoutthelengthofthespokesandthroughouttheextentoftheauxiliaryspiral。Thesepieces,togetherwiththerestoftheframework,aremadeofplain,straight,solidthread。
But,whenavictimiscaught,sometimesrightattheedgeoftheweb,theSpiderhastorushupquickly,tobinditandovercomeitsattemptstofreeitself。Sheiswalkingthenuponhernetwork;andIdonotfindthatshesufferstheleastinconvenience。Thelime-
threadsarenotevenliftedbythemovementsofherlegs。
Inmyboyhood,whenatroopofuswouldgo,onThursdays,{31}totryandcatchaGoldfinchinthehemp-fields,weused,beforecoveringthetwigswithglue,togreaseourfingerswithafewdropsofoil,lestweshouldgetthemcaughtinthestickymatter。
DoestheEpeiraknowthesecretoffattysubstances?Letustry。
Irubmyexploringstrawwithslightlyoiledpaper。Whenappliedtothespiralthreadoftheweb,itnownolongerstickstoit。
Theprincipleisdiscovered。IpulloutthelegofaliveEpeira。
Broughtjustasitisintocontactwiththelime-threads,itdoesnotsticktothemanymorethantotheneutralcords,whetherspokesorpartsoftheframework。Wewereentitledtoexpectthis,judgingbytheSpider’sgeneralimmunity。
Buthereissomethingthatwhollyalterstheresult。Iputthelegtosoakforaquarterofanhourindisulphideofcarbon,thebestsolventoffattymatters。Iwashitcarefullywithabrushdippedinthesamefluid。Whenthiswashingisfinished,thelegstickstothesnaring-threadquiteeasilyandadherestoitjustaswellasanythingelsewould,theunoiledstraw,forinstance。
DidIguessarightwhenIjudgedthatitwasafattysubstancethatpreservedtheEpeirafromthesnaresofherstickyCatherine-wheel?
Theactionofthecarbondisulphideseemstosayyes。Besides,thereisnoreasonwhyasubstanceofthiskind,whichplayssofrequentapartinanimaleconomy,shouldnotcoattheSpiderveryslightlybythemereactofperspiration。WeusedtorubourfingerswithalittleoilbeforehandlingthetwigsinwhichtheGoldfinchwastobecaught;evensotheEpeiravarnishesherselfwithaspecialsweat,tooperateonanypartofherwebwithoutfearofthelime-threads。
However,anundulyprotractedstayonthestickythreadswouldhaveitsdrawbacks。Inthelongrun,continualcontactwiththosethreadsmightproduceacertainadhesionandinconveniencetheSpider,whomustpreserveallheragilityinordertorushuponthepreybeforeitcanreleaseitself。Forthisreason,gummythreadsareneverusedinbuildingthepostofinterminablewaiting。
Itisonlyonherresting-floorthattheEpeirasits,motionlessandwithhereightlegsoutspread,readytomarktheleastquiverinthenet。Itishere,again,thatshetakeshermeals,oftenlong-drawn-out,whenthejointisasubstantialone;itishitherthat,aftertrussingandnibblingit,shedragsherpreyattheendofathread,toconsumeitathereaseonanon-viscousmat。Asahunting-postandrefectory,theEpeirahascontrivedacentralspace,freefromglue。
Asfortheglueitself,itishardlypossibletostudyitschemicalproperties,becausethequantityissoslight。Themicroscopeshowsittricklingfromthebrokenthreadsintheformofatransparentandmoreorlessgranularstreak。Thefollowingexperimentwilltellusmoreaboutit。
Withasheetofglasspassedacrosstheweb,Igatheraseriesoflime-threadswhichremainfixedinparallellines。Icoverthissheetwithabell-jarstandinginadepthofwater。Soon,inthisatmospheresaturatedwithhumidity,thethreadsbecomeenvelopedinawaterysheath,whichgraduallyincreasesandbeginstoflow。Thetwistedshapehasbythistimedisappeared;andthechannelofthethreadrevealsachapletoftranslucentorbs,thatistosay,aseriesofextremelyfinedrops。
Intwenty-fourhours,thethreadshavelosttheircontentsandarereducedtoalmostinvisiblestreaks。IfIthenlayadropofwaterontheglass,Igetastickysolution,similartothatwhichaparticleofgumarabicmightyield。Theconclusionisevident:
theEpeira’sglueisasubstancethatabsorbsmoisturefreely。Inanatmospherewithahighdegreeofhumidity,itbecomessaturatedandpercolatesbysweatingthroughthesideofthetubularthreads。
Thesedataexplaincertainfactsrelatingtotheworkofthenet。
Thefull-grownBandedandSilkyEpeiraeweaveatveryearlyhours,longbeforedawn。Shouldtheairturnmisty,theysometimesleavethatpartofthetaskunfinished:theybuildthegeneralframework,theylaythespokes,theyevendrawtheauxiliaryspiral,forallthesepartsareunaffectedbyexcessofmoisture;
buttheyareverycarefulnottoworkatthelime-threads,which,ifsoakedbythefog,woulddissolveintostickyshredsandlosetheirefficacybybeingwetted。Thenetthatwasstartedwillbefinishedto-morrow,iftheatmospherebefavourable。
Whilethehighly-absorbentcharacterofthesnaring-threadhasitsdrawbacks,italsohascompensatingadvantages。BothEpeirae,whenhuntingbyday,affectthosehotplaces,exposedtothefierceraysofthesun,whereintheCricketsdelight。Inthetorridheatsofthedog-days,therefore,thelime-threads,butforspecialprovisions,wouldbeliabletodryup,toshrivelintostiffandlifelessfilaments。Buttheveryoppositehappens。Atthemostscorchingtimesoftheday,theycontinuesupple,elasticandmoreandmoreadhesive。
Howisthisbroughtabout?Bytheirverypowersofabsorption。
Themoistureofwhichtheairisneverdeprivedpenetratesthemslowly;itdilutesthethickcontentsoftheirtubestotherequisitedegreeandcausesittooozethrough,asandwhentheearlierstickinessdecreases。Whatbird-catchercouldviewiththeGardenSpiderintheartoflayinglime-snares?AndallthisindustryandcunningforthecaptureofaMoth!
Then,too,whatapassionforproduction!Knowingthediameteroftheorbandthenumberofcoils,wecaneasilycalculatethetotallengthofthestickyspiral。Wefindthat,inonesitting,eachtimethatsheremakesherweb,theAngularEpeiraproducessometwentyyardsofgummythread。ThemoreskilfulSilkyEpeiraproducesthirty。Well,duringtwomonths,theAngularEpeira,myneighbour,renewedhersnarenearlyeveryevening。Duringthatperiod,shemanufacturedsomethinglikethree-quartersofamileofthistubularthread,rolledintoatighttwistandbulgingwithglue。
Ishouldlikeananatomistendowedwithbetterimplementsthanmineandwithlesstiredeyesighttoexplaintoustheworkofthemarvellousrope-yard。Howisthesilkymattermouldedintoacapillarytube?Howisthistubefilledwithglueandtightlytwisted?Andhowdoesthissamewire-millalsoturnoutplainthreads,wroughtfirstintoaframeworkandthenintomuslinandsatin;next,arussetfoam,suchasfillsthewalletoftheBandedEpeira;next,theblackstripesstretchedinmeridiancurvesonthatsamewallet?Whatanumberofproductstocomefromthatcuriousfactory,aSpider’sbelly!Ibeholdtheresults,butfailtounderstandtheworkingofthemachine。Ileavetheproblemtothemastersofthemicrotomeandthescalpel。
CHAPTERXII:THEGARDENSPIDERS:THETELEGRAPH-WIRE
OfthesixGardenSpidersthatformtheobjectofmyobservations,twoonly,theBandedandthesilkyEpeira,remainconstantlyintheirwebs,evenundertheblindingraysofafiercesun。Theothers,asarule,donotshowthemselvesuntilnightfall。Atsomedistancefromthenet,theyhavearoughandreadyretreatinthebrambles,anambushmadeofafewleavesheldtogetherbystretchedthreads。Itisherethat,forthemostpart,theyremaininthedaytime,motionlessandsunkinmeditation。
Buttheshrilllightthatvexesthemisthejoyofthefields。Atsuchtimes,theLocusthopsmorenimblythanever,moregailyskimstheDragon-fly。Besides,thelimyweb,despitetherentssufferedduringthenight,isstillinserviceablecondition。Ifsomegiddy-pateallowhimselftobecaught,willtheSpider,atthedistancewheretoshehasretired,beunabletotakeadvantageofthewindfall?Neverfear。Shearrivesinaflash。Howissheapprised?Letusexplainthematter。
Thealarmisgivenbythevibrationoftheweb,muchmorethanbythesightofthecapturedobject。Averysimpleexperimentwillprovethis。IlayuponaBandedEpeira’slime-threadsaLocustthatsecondasphyxiatedwithcarbondisulphide。Thecarcassisplacedinfront,orbehind,orateithersideoftheSpider,whositsmovelessinthecentreofthenet。Ifthetestistobeappliedtoaspecieswithadaytimehiding-placeamidthefoliage,thedeadLocustislaidontheweb,moreorlessnearthecentre,nomatterhow。
Inbothcases,nothinghappensatfirst。TheEpeiraremainsinhermotionlessattitude,evenwhenthemorselisatashortdistanceinfrontofher。Sheisindifferenttothepresenceofthegame,doesnotseemtoperceiveit,somuchsothatsheendsbywearingoutmypatience。Then,withalongstraw,whichenablesmetoconcealmyselfslightly,Isetthedeadinsecttrembling。
Thatisquiteenough。TheBandedEpeiraandtheSilkyEpeirahastentothecentralfloor;theotherscomedownfromthebranch;
allgototheLocust,swathehimwithtape,treathim,inshort,astheywouldtreatalivepreycapturedundernormalconditions。Ittooktheshakingofthewebtodecidethemtoattack。
PerhapsthegreycolouroftheLocustisnotsufficientlyconspicuoustoattractattentionbyitself。Thenletustryred,thebrightestcolourtoourretinaandprobablyalsototheSpiders’。NoneofthegamehuntedbytheEpeiraebeingcladinscarlet,Imakeasmallbundleoutofredwool,abaitofthesizeofaLocust。Iglueittotheweb。
Mystratagemsucceeds。Aslongastheparcelisstationary,theSpiderisnotroused;but,themomentittrembles,stirredbymystraw,sherunsupeagerly。
Therearesillyoneswhojusttouchthethingwiththeirlegsand,withoutfurtherenquiries,swatheitinsilkafterthemanneroftheusualgame。Theyevengosofarastodigtheirfangsintothebait,followingtheruleofthepreliminarypoisoning。ThenandthenonlythemistakeisrecognizedandthetrickedSpiderretiresanddoesnotcomeback,unlessitbelongafterwards,whensheflingsthecumbersomeobjectoutoftheweb。
Therearealsocleverones。Liketheothers,thesehastentothered-woollenlure,whichmystrawinsidiouslykeepsmoving;theycomefromtheirtentamongtheleavesasreadilyasfromthecentreoftheweb;theyexploreitwiththeirpalpiandtheirlegs;but,soonperceivingthatthethingisvalueless,theyarecarefulnottospendtheirsilkonuselessbonds。Myquiveringbaitdoesnotdeceivethem。Itisflungoutafterabriefinspection。
Still,thecleverones,likethesillyones,runevenfromadistance,fromtheirleafyambush。Howdotheyknow?Certainlynotbysight。Beforerecognizingtheirmistake,theyhavetoholdtheobjectbetweentheirlegsandeventonibbleatitalittle。
Theyareextremelyshort-sighted。Atahand’s-breadth’sdistance,thelifelessprey,unabletoshaketheweb,remainsunperceived。
Besides,inmanycases,thehuntingtakesplaceinthedensedarknessofthenight,whensight,evenifitweregood,wouldnotavail。
Iftheeyesareinsufficientguides,evencloseathand,howwillitbewhenthepreyhastobespiedfromafar!Inthatcase,anintelligence-apparatusforlong-distanceworkbecomesindispensable。Wehavenodifficultyindetectingtheapparatus。
LetuslookattentivelybehindthewebofanyEpeirawithadaytimehiding-place:weshallseeathreadthatstartsfromthecentreofthenetwork,ascendsinaslantinglineoutsidetheplaneofthewebandendsattheambushwheretheSpiderlurksallday。Exceptatthecentralpoint,thereisnoconnectionbetweenthisthreadandtherestofthework,nointerweavingwiththescaffolding-
threads。Freeofimpediment,thelinerunsstraightfromthecentreofthenettotheambush-tent。Itslengthaveragestwenty-
twoinches。TheAngularEpeira,settledhighupinthetrees,hasshownmesomeaslongaseightorninefeet。
Thereisnodoubtthatthisslantinglineisafoot-bridgewhichallowstheSpidertorepairhurriedlytotheweb,whensummonedbyurgentbusiness,andthen,whenherroundisfinished,toreturntoherhut。Infact,itistheroadwhichIseeherfollow,ingoingandcoming。Butisthatall?No;for,iftheEpeirahadnoaiminviewbutameansofrapidtransitbetweenhertentandthenet,thefoot-bridgewouldbefastenedtotheupperedgeoftheweb。Thejourneywouldbeshorterandtheslopelesssteep。
Why,moreover,doesthislinealwaysstartinthecentreofthestickynetworkandnowhereelse?Becausethatisthepointwherethespokesmeetand,therefore,thecommoncentreofvibration。