首页 >出版文学> Men of Invention and Industry>第43章
  “Ibegantohaveawishforatelescope,bymeansofwhichI
  mightbeabletoseealittlemorethanwithmynakedeyes。ButIfoundthatIcouldnotgetanythingofmuchuse,shortof20L。
  Icouldnotforalongtimefeeljustifiedinspendingsomuchmoneyformyownpersonalenjoyment。Mychildrenwerethenyounganddependentuponme。Theyrequiredtoattendschool——foreducationisathingthatparentsmustnotneglect,withaviewtothefuture。However,abouttheyear1875,myattentionwascalledtoacheapinstrumentadvertisedbySolomon——whathecalledhis’5L。telescope。’Ipurchasedone,andittantalisedme;forthepoweroftheinstrumentwassuchastoteachmenothingofthesurfaceoftheplanets。Afterusingitforabouttwoyears,Isoldittoastudent,andthenfoundthatIhadaccumulatedenoughsavingstoenablemetobuymypresentinstrument。Willyoucomeintothenextroomandlookatit?“
  Iwentaccordinglyintotheadjoiningroom,andlookedatthenewtelescope。Itwastakenfromitscase,putuponitstripod,andlookedinbeautifulcondition。Itisarefractor,madebyCookeandSonsofYork。Theobjectglassisthreeinches;thefocallengthforty-threeinches;andthetelescope,whendrawnout,withthepancraticeyepieceattached,isaboutfourfeet。ItwasmadeafterMr。Robertson’sdirections,andisasortofcombinationofinstruments。
  “Eventhatinstrument,“heproceeded,“goodasitisforthemoney,tantalisesmeyet。Alookthroughafixedequatorial,suchaseverylargeobservatoryisfurnishedwithisagloriousview。IshallneverforgetthesightthatIgotwhenatDunechtObservatory,towhichIwasinvitedthroughthekindnessofDr。
  Copeland,theEarlofCrawfordandBalcarres’principalastronomer。
  “YouaskmewhatIhavedoneinastronomicalresearch?IamsorrytosayIhavebeenabletodolittleexcepttogratifymyowncuriosity;andeventhen,asIsay,Ihavebeenmuchtantalised。Ihavewatchedthespotsonthesunfromdaytodaythroughobscuredglasses,sincetheyear1878,andmademanydrawingsofthem。Mr。RandCapron,theastronomer,ofGuildown,Guildford,desiredtoseethesedrawings,andafterexpressinghissatisfactionwiththem,hesentthemtoMr。Christie,AstronomerRoyal,Greenwich。Althoughphotographsofthesolarsurfacewerepreferred,Mr。Capronthoughtthatmysketchesmightsupplygapsinthepartiallycloudydays,aswellasdetailswhichmightnotappearonthephotographicplates。IreceivedaverykindletterfromMr。Christie,inwhichhesaidthatitwouldbeverydifficulttomaketheresultsobtainedfromdrawings,howeveraccurate,atallcomparablewiththosederivedfromphotographs;especiallyasregardstheaccuratesizeofthespotsascomparedwiththediameterofthesun。Andnodoubtheisright。
  “What,doIsuppose,isthecauseofthesespotsinthesun?
  Well,thatisaverydifficultquestiontoanswer。Changesareconstantlygoingonatthesun’ssurface,or,Imayrathersay,inthesun’sinterior,andmakingthemselvesapparentatthesurface。Sometimestheygoonwithenormousactivity;atothertimestheyaremorequiet。Theyrecuralternatelyinperiodsofsevenoreightweeks,whiletheseagainarealsosubjecttoaperiodofaboutelevenyears——thatis,theshortrecurringoutburstsgoonforsomeyears,whentheyattainamaximum,fromwhichtheygoondecreasing。ImaysaythatwearenowAugust1883at,orverynear,amaximumepoch。Thereisnodoubtthatthisperiodhasanintimateconnectionwithourauroraldisplays;
  butIdon’tthinkthattheinfluencesun-spotshaveonlightorheatisperceptible。Whateverinfluencetheypossesswouldbefeltalikeonthewholeterrestrialglobe。Wehavewet,dry,cold,andwarmyears,buttheyarenevergeneral。Thekindofseasonwhichprevailsinonecountryisoftenquitereversedinanotherperhapsintheadjacentone。Notsowithourauroraldisplays。Theyareuniversalonbothsidesoftheglobe;andfrompoletopolethemagneticneedletremblesduringtheircontinuance。Someauthoritiesareofopinionthattheseeleven-yearcyclesaresubjecttoalargercycle,butsun-spotobservationshavenotexistedlongenoughtodeterminethispoint。Formyself,Ihaveagreatdifficultyinforminganopinion。Ihaveverylittledoubtthatthespotsaredepressionsonthesurfaceofthesun。Thisismoreapparentwhenthespotisonthelimb。Ihaveoftenseentheedgeveryruggedandunevenwhengroupsoflargespotswereabouttocomeroundontheeastside。Ihavecommunicatedsomeofmyobservationsto’TheObservatory,’themonthlyreviewofastronomy,editedbyMr。
  Christie,nowAstronomerRoyal,[2]aswellastoTheScotsmam,andsomeofourlocalpapers。[3]
  “Ihavealsotakenuptheobservationofvariablestarsinalimitedportionoftheheavens。That,and’huntingforcomets’
  isaboutalltherealastronomicalworkthatanamateurcandonowadaysinourclimate,withathree-inchtelescope。IamgreatlyindebtedtotheEarlofCrawfordandBalcarres,whoregularlysendsmecircularsofallastronomicaldiscoveries,bothinthisandforeigncountries。Iwillgiveaninstanceoftheusefulnessofthesecirculars。Onthemorningofthe4thofOctober,1880,acometwasdiscoveredbyHartwig,ofStrasburg,intheconstellationofCorona。HetelegraphedittoDunechtObservatory,fifteenmilesfromAberdeen。Thecircularsannouncingthediscoverywereprintedanddespatchedbyposttovariousastronomers。Mycircularreachedmeby7P。M。,and,thenightbeingfavourable,Idirectedmytelescopeuponthepartoftheheavensindicated,andfoundthecometalmostatonce——thatis,withinfifteenhoursofthedateofitsdiscoveryatStrasburg。
  “InApril,1878,alargemeteorwasobservedinbroaddaylight,passingfromsouthtonorth,andfallingitwassupposed,abouttwentymilessouthofBallater。Mr。A。S。Herschel,ProfessorofPhysicsintheCollegeofScience,’Newcastle-on-Tyne,publishedaletterinTheScotsmam,intimatinghisdesiretobeinformedoftheparticularsofthemeteor’sflightbythosewhohadseenit。
  AsIwasoneofthosewhohadobservedthesplendidmeteorflashnorthwardsalmostunderthefaceofthebrightsunat10。25
  A。M,IsenttheProfessorafullaccountofwhatIhadseen,forwhichheprofessedhisstrongobligations。ThisledtoaverypleasantcorrespondencewithProfessorHerschel。Afterthis,I
  devotedconsiderableattentiontometeors,andsentmanycontributionsto’TheObservatory’onthesubject。[4]
  “YouaskmewhatarethehoursatwhichImakemyobservations?
  Iamdueattherailwaystationatsixinthemorning,andI
  leaveatsixintheevening;butIhavetwohoursduringthedayformealsandrest。SometimesIgetaglanceattheheavensinthewintermorningswhentheskyisclear,huntingforcomets。
  Myobservationsonthesunareusuallymadetwiceadayduringmymealhours,orintheearlymorningorlateateveninginsummer,whilethesunisvisible。Yes,youareright;Itryandmakethebestuseofmytime。ItismuchtooshortforallthatIproposetodo。Myeveningsaremyown。Whentheheavensareclear,I
  watchthem;whenobscured,therearemybooksandletters。
  “Dr。AlexanderBrown,ofArbroath,isoneofmycorrespondents。
  IhavesenthimmydrawingsoftheringsofSaturn,ofJupiter’sbeltandsatellites。Dr。RalphCopeland,ofDunecht,isalsoaverygoodfriendandadviser。Occasionally,too,Isendaccountsofsolardisturbances,cometawithinsight,eclipses,andoccultations,totheScotsman,theDundeeEveningTelegraphandEveningNews,ortotheBlairgowrieAdvertiser。Besides,Iamthelocalobserverofmeteorology,andcommunicateregularlywithMr。Symons。Thesethingsentirelyfillupmytime。
  “DoIintendalwaystoremainarailwayporter?Oh,yes;Iamverycomfortable!Thecompanyareverykindtome,andIhopeI
  servethemfaithfully。ItistrueSheriffBarclayhas,withoutmyknowledge,recommendedmetoseveralwell-knownastronomersasanobserver。Butatmytimeoflifechangesarenottobedesired。IamquitesatisfiedtogoonasIamdoing。Myyoungpeoplearegrowingup,andarewillingtoworkforthemselves。
  Butcome,sir,“heconcluded,“comeintothegarden,andlookatthemoonthroughmytelescope。“
  Wewentintothegardenaccordingly,butacloudwasoverthemoon,andwecouldnotseeit。Atthetopofthegardenwastheself-registeringbarometer,thepitchertomeasuretherainfall,andtheotherapparatusnecessarytoenablethe“Diagramofbarometer,thermometer,rain,andwind“tobeconducted,sofarasCouparAngusisconcerned。ThisMr。Robertsonhasdoneforfouryearspast。Asthehourwaslate,andasIknewthatmyentertainermustbeupbysixnextmorning,Itookmyleave。
  Aman’scharacteroftenexhibitsitselfinhisamusements。OnemusthaveahighrespectforthecharacterofJohnRobertson,wholooksatthemannerinwhichhespendshissparetime。Hisastronomicalworkisaltogetheralabouroflove。Itishishobby;andtheworkingmanmayhavehishobbyaswellastherich。Inhiscaseheisneverlessidlethanwhenidle。Somemaythinkthatheiscastinghisbreaduponthewaters,andthathemayfinditaftermanydays。Butitisnotwiththisobjectthathecarriesonhisleisure-hourpursuits。Somehavetried——
  sheriffBarclayamongothers[5]——toobtainappointmentsforhiminconnectionwithastronomicalobservation;otherstosecureadvancementforhiminhisownline。Butheisamanwhoissatisfiedwithhislot——oneoftherarestthingsonearth。
  Perhapsitisbylookingsomuchuptotheheavensthathehasbeenenabledtoobtainhisportionofcontentment。
  NextmorningIfoundhimbusyatthestation,makingarrangementsforthedepartureofthepassengertrainforPerth,andevidentlyuponthebestoftermswitheverybody。AndhereIleaveJohnRobertson,thecontentedCouparAngusastronomer。
  SomeyearsagoIreceivedfrommyfriendMr。NasmythaletterofintroductiontothelateMr。CookeofYork,whilethelatterwasstillliving。Ididnotpresentitatthetime;butInowproposedtovisit,onmyreturnhomewards,theestablishmentwhichhehadfoundedatYorkforthemanufactureoftelescopesandotheropticalinstruments。Indeed,whatamanmaydoforhimselfaswellasforscience,cannotbebetterillustratedthanbythelifeofthisremarkableman。