Travels and Researches in South Africa

第21章

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第21章

Travels and Researches in South Africa Dr David Livingstone

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Travels and Researches in South Africa
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  Withoutatpresententeringminutelyintothisfeatureoftheclimate,itmayberemarkedthattheKurumandistrictpresentsevidenceofthisdrysouthernregionhaving,atnoverydistantdate,beenaswellwateredasthecountrynorthofLakeNgamiisnow。

  Ancientriver-bedsandwater-coursesabound,andtheveryeyesoffountainslongsincedriedupmaybeseen,inwhichtheflowofcenturieshasworntheseorificesfromaslittoanovalform,havingontheirsidesthetufasoabundantlydepositedfromtheseprimitivewaters;

  andjustwherethesplashings,madewhenthestreamfellontherockbelow,maybesupposedtohavereachedandevaporated,thesamephenomenonappearsManyofthesefailingfountainsnolongerflow,becausethebrinkoverwhichtheyranisnowtoohigh,orbecausetheelevationofthewesternsideofthecountryliftsthelandawayfromthewatersupplybelow;butletacuttingbemadefromalowerlevelthanthebrink,andthroughittoapartbelowthesurfaceofthewater,andwaterflowsperennially。

  SeveraloftheseancientfountainshavebeenresuscitatedbytheBechuanasnearKuruman,whooccasionallyshowtheirfeelingsofself-esteembylaboringformonthsatdeepcuttings,which,havingoncebegun,theyfeelboundinhonortoperseverein,thoughtoldbyamissionarythattheycanneverforcewatertorunuphill。

  ItisinterestingtoobservetheindustryofmanyBoersinthisregioninmakinglonganddeepcanalsfromlowerlevelsuptospotsdestituteoftheslightestindicationofwaterexistingbeneathexceptafewrushesandapeculiarkindofcoarse,reddish-coloredgrassgrowinginahollow,whichancientlymusthavebeentheeyeofafountain,butisnowfilledupwithsofttufaInotherinstances,theindicationofwaterbelowconsistsoftherushesgrowingonalong,sandyridgeafootortwoinheightinsteadofinafurrow。

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