第62章

类别:其他 作者:Charles Darwin字数:5441更新时间:18/12/21 17:23:57
Noclothesseemedtoopposeanyobstacletotheair;Isufferedverymuchfromthecold,sothatIcouldnotsleep,andinthemorningrosewithmybodyquitedullandbenumbed。 IntheCordillerafurthersouthward,peoplelosetheirlivesfromsnowstorms; here,itsometimeshappensfromanothercause。Myguide,whenaboyoffourteenyearsold,waspassingtheCordillerawithapartyinthemonthofMay;andwhileinthecentralparts,afuriousgaleofwindarose,sothatthemencouldhardlyclingontheirmules,andstoneswereflyingalongtheground。Thedaywascloudless,andnotaspeckofsnowfell,butthetemperaturewaslow。Itisprobablethatthethermometercouldnothavestoodverymanydegreesbelowthefreezing-point,buttheeffectontheirbodies,illprotectedbyclothing,musthavebeeninproportiontotherapidityofthecurrentofcoldair。Thegalelastedformorethanaday;themenbegantolosetheirstrength,andthemuleswouldnotmoveonwards。Myguide’sbrothertriedtoreturn,butheperished,andhisbodywasfoundtwoyearsafterwards,Lyingbythesideofhismuleneartheroad,withthebridlestillinhishand。Twoothermeninthepartylosttheirfingersandtoes;andoutoftwohundredmulesandthirtycows,onlyfourteenmulesescapedalive。Manyyearsagothewholeofalargepartyaresupposedtohaveperishedfromasimilarcause,buttheirbodiestothisdayhaveneverbeendiscovered。Theunionofacloudlesssky,lowtemperature,andafuriousgaleofwind,mustbe,Ishouldthink,inallpartsoftheworldanunusualoccurrence。 June29th——Wegladlytravelleddownthevalleytoourformernight’slodging,andthencetoneartheAguaamarga。OnJuly1stwereachedthevalleyofCopiapo。Thesmellofthefreshcloverwasquitedelightful,afterthescentlessairofthedry,sterileDespoblado。WhilststayinginthetownIheardanaccountfromseveraloftheinhabitants,ofahillintheneighbourhoodwhichtheycalled“ElBramador。”——theroarerorbellower。Ididnotatthetimepaysufficientattentiontotheaccount; but,asfarasIunderstood,thehillwascoveredbysand,andthenoisewasproducedonlywhenpeople,byascendingit,putthesandinmotion。 ThesamecircumstancesaredescribedindetailontheauthorityofSeetzenandEhrenberg,[4]asthecauseofthesoundswhichhavebeenheardbymanytravellersonMountSinaineartheRedSea。OnepersonwithwhomIconversedhadhimselfheardthenoise:hedescribeditasverysurprising;andhedistinctlystatedthat,althoughhecouldnotunderstandhowitwascaused,yetitwasnecessarytosetthesandrollingdowntheacclivity。Ahorsewalkingoverdrycoarsesand,causesapeculiarchirpingnoisefromthefrictionoftheparticles;acircumstancewhichIseveraltimesnoticedonthecoastofBrazil。 ThreedaysafterwardsIheardoftheBeagle’sarrivalatthePort,distanteighteenleaguesfromthetown。Thereisverylittlelandcultivateddownthevalley;itswideexpansesupportsawretchedwirygrass,whicheventhedonkeyscanhardlyeat。Thispoornessofthevegetationisowingtothequantityofsalinematterwithwhichthesoilisimpregnated。ThePortconsistsofanassemblageofmiserablelittlehovels,situatedatthefootofasterileplain。Atpresent,astherivercontainswaterenoughtoreachthesea,theinhabitantsenjoytheadvantageofhavingfreshwaterwithinamileandahalf。Onthebeachtherewerelargepilesofmerchandise,andthelittleplacehadanairofactivity。IntheeveningIgavemyadios,withaheartygood-will,tomycompanionMarianoGonzales,withwhomI hadriddensomanyleaguesinChile。ThenextmorningtheBeaglesailedforIquique。 July12th——WeanchoredintheportofIquique,inlat。20degs。12’,onthecoastofPeru。Thetowncontainsaboutathousandinhabitants,andstandsonalittleplainofsandatthefootofagreatwallofrock,2000 feetinheight,hereformingthecoast。Thewholeisutterlydesert。A lightshowerofrainfallsonlyonceinverymanyyears;andtheravinesconsequentlyarefilledwithdetritus,andthemountain-sidescoveredbypilesoffinewhitesand,eventoaheightofathousandfeet。Duringthisseasonoftheyearaheavybankofclouds,stretchedovertheocean,seldomrisesabovethewallofrocksonthecoast。Theaspectoftheplacewasmostgloomy;thelittleport,withitsfewvessels,andsmallgroupofwretchedhouses,seemedoverwhelmedandoutofallproportionwiththerestofthescene。 Theinhabitantslivelikepersonsonboardaship:everynecessarycomesfromadistance:waterisbroughtinboatsfromPisagua,aboutfortymilesnorthward,andissoldattherateofninereals(4s。6d。)aneighteen-galloncask:Iboughtawine-bottlefullforthreepence。Inlikemannerfirewood,andofcourseeveryarticleoffood,isimported。Veryfewanimalscanbemaintainedinsuchaplace:ontheensuingmorningIhiredwithdifficulty,atthepriceoffourpoundssterling,twomulesandaguidetotakemetothenitrateofsodaworks。TheseareatpresentthesupportofIquique。 Thissaltwasfirstexportedin1830:inoneyearanamountinvalueofonehundredthousandpoundssterling,wassenttoFranceandEngland。Itisprincipallyusedasamanureandinthemanufactureofnitricacid: owingtoitsdeliquescentpropertyitwillnotserveforgunpowder。Formerlythereweretwoexceedinglyrichsilver-minesinthisneighbourhood,buttheirproduceisnowverysmall。 Ourarrivalintheoffingcausedsomelittleapprehension。Peruwasinastateofanarchy;andeachpartyhavingdemandedacontribution,thepoortownofIquiquewasintribulation,thinkingtheevilhourwascome。 Thepeoplehadalsotheirdomestictroubles;ashorttimebefore,threeFrenchcarpentershadbrokenopen,duringthesamenight,thetwochurches,andstolenalltheplate:oneoftherobbers,however,subsequentlyconfessed,andtheplatewasrecovered。TheconvictsweresenttoArequipa,whichthoughthecapitalofthisprovince,istwohundredleaguesdistant,thegovernmenttherethoughtitapitytopunishsuchusefulworkmen,whocouldmakeallsortsoffurniture;andaccordinglyliberatedthem。Thingsbeinginthisstate,thechurcheswereagainbrokenopen,butthistimetheplatewasnotrecovered。Theinhabitantsbecamedreadfullyenraged,anddeclaringthatnonebuthereticswouldthus“eatGodAlmighty。”proceededtotorturesomeEnglishmen,withtheintentionofafterwardsshootingthem。Atlasttheauthoritiesinterfered,andpeacewasestablished。 13th——InthemorningIstartedforthesaltpetre-works,adistanceoffourteenleagues。Havingascendedthesteepcoast-mountainsbyazigzagsandytrack,wesooncameinviewoftheminesofGuantajayaandSt。Rosa。 Thesetwosmallvillagesareplacedattheverymouthsofthemines;andbeingpercheduponhills,theyhadastillmoreunnaturalanddesolateappearancethanthetownofIquique。Wedidnotreachthesaltpetre-workstillaftersunset,havingriddenalldayacrossanundulatingcountry,acompleteandutterdesert。Theroadwasstrewedwiththebonesanddriedskinsofmanybeastsofburdenwhichhadperishedonitfromfatigue。ExceptingtheVulturaura,whichpreysonthecarcasses,Isawneitherbird,quadruped,reptile,norinsect。Onthecoast-mountains,attheheightofabout2000 feetwhereduringthisseasonthecloudsgenerallyhang,averyfewcactiweregrowinginthecleftsofrock;andtheloosesandwasstrewedoverwithalichen,whichliesonthesurfacequiteunattached。ThisplantbelongstothegenusCladonia,andsomewhatresemblesthereindeerlichen。Insomepartsitwasinsufficientquantitytotingethesand,asseenfromadistance,ofapaleyellowishcolour。Furtherinland,duringthewholerideoffourteenleagues,Isawonlyoneothervegetableproduction,andthatwasamostminuteyellowlichen,growingonthebonesofthedeadmules。ThiswasthefirsttruedesertwhichIhadseen:theeffectonmewasnotimpressive; butIbelievethiswasowingtomyhavingbecomegraduallyaccustomedtosuchscenes,asIrodenorthwardfromValparaiso,throughCoquimbo,toCopiapo。Theappearanceofthecountrywasremarkable,frombeingcoveredbyathickcrustofcommonsalt,andofastratifiedsaliferousalluvium,whichseemstohavebeendepositedasthelandslowlyroseabovethelevelofthesea。Thesaltiswhite,veryhard,andcompact:itoccursinwaterwornnodulesprojectingfromtheagglutinatedsand,andisassociatedwithmuchgypsum。Theappearanceofthissuperficialmassverycloselyresembledthatofacountryaftersnow,beforethelastdirtypatchesarethawed。 Theexistenceofthiscrustofasolublesubstanceoverthewholefaceofthecountry,showshowextraordinarilydrytheclimatemusthavebeenforalongperiod。 AtnightIsleptatthehouseoftheownerofoneofthesaltpetremines。 Thecountryishereasunproductiveasnearthecoast;butwater,havingratherabitterandbrackishtaste,canbeprocuredbydiggingwells。Thewellatthishousewasthirty-sixyardsdeep:asscarcelyanyrainfalls,itisevidentthewaterisnotthusderived;indeedifitwere,itcouldnotfailtobeassaltasbrine,forthewholesurroundingcountryisincrustedwithvarioussalinesubstances。WemustthereforeconcludethatitpercolatesundergroundfromtheCordillera,thoughdistantmanyleagues。Inthatdirectionthereareafewsmallvillages,wheretheinhabitants,havingmorewater,areenabledtoirrigatealittleland,andraisehay,onwhichthemulesandasses,employedincarryingthesaltpetre,arefed。Thenitrateofsodawasnowsellingattheship’ssideatfourteenshillingsperhundredpounds:thechiefexpenseisitstransporttothesea-coast。Themineconsistsofahardstratum,betweentwoandthreefeetthick,ofthenitratemingledwithalittleofthesulphateofsodaandagooddealofcommonsalt。Itliesclosebeneaththesurface,andfollowsforalengthofonehundredandfiftymilesthemarginofagrandbasinorplain;this,fromitsoutline,manifestlymustoncehavebeenalake,ormoreprobablyaninlandarmofthesea,asmaybeinferredfromthepresenceofiodicsaltsinthesalinestratum。Thesurfaceoftheplainis3300feetabovethePacific。 19th——WeanchoredintheBayofCallao,theseaportofLima,thecapitalofPeru。Westayedheresixweeksbutfromthetroubledstateofpublicaffairs,Isawverylittleofthecountry。Duringourwholevisittheclimatewasfarfrombeingsodelightful,asitisgenerallyrepresented。 Adullheavybankofcloudsconstantlyhungovertheland,sothatduringthefirstsixteendaysIhadonlyoneviewoftheCordillerabehindLima。 Thesemountains,seeninstages,oneabovetheother,throughopeningsintheclouds,hadaverygrandappearance。Itisalmostbecomeaproverb,thatrainneverfallsinthelowerpartofPeru。Yetthiscanhardlybeconsideredcorrect;forduringalmosteverydayofourvisittherewasathickdrizzlingmist,whichwassufficienttomakethestreetsmuddyandone’sclothesdamp:thisthepeoplearepleasedtocallPeruviandew。 Thatmuchraindoesnotfallisverycertain,forthehousesarecoveredonlywithflatroofsmadeofhardenedmud;andonthemoleshiploadsofwheatwerepiledup,beingthusleftforweekstogetherwithoutanyshelter。 IcannotsayIlikedtheverylittleIsawofPeru:insummer,however,itissaidthattheclimateismuchpleasanter。Inallseasons,bothinhabitantsandforeignerssufferfromsevereattacksofague。ThisdiseaseiscommononthewholecoastofPeru,butisunknownintheinterior。Theattacksofillnesswhicharisefrommiasmaneverfailtoappearmostmysterious。 Sodifficultisittojudgefromtheaspectofacountry,whetherornotitishealthy,thatifapersonhadbeentoldtochoosewithinthetropicsasituationappearingfavourableforhealth,veryprobablyhewouldhavenamedthiscoast。TheplainroundtheoutskirtsofCallaoissparinglycoveredwithacoarsegrass,andinsomepartsthereareafewstagnant,thoughverysmall,poolsofwater。Themiasma,inallprobability,arisesfromthese:forthetownofAricawassimilarlycircumstanced,anditshealthinesswasmuchimprovedbythedrainageofsomelittlepools。Miasmaisnotalwaysproducedbyaluxuriantvegetationwithanardentclimate; formanypartsofBrazil,evenwheretherearemarshesandarankvegetation,aremuchmorehealthythanthissterilecoastofPeru。Thedensestforestsinatemperateclimate,asinChiloe,donotseemintheslightestdegreetoaffectthehealthyconditionoftheatmosphere。