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Cover Design LEJAREN HILLER
Men of SciencePORTRAITS
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able acres American become boat building built called carried cause cent Chicago coal comes complete concrete cost course crop disease dollars effect electric engine experiments fact farm feet field fire five followed four give ground half hand hour hundred important inches interest keep kind known land less light living look machine means ment method miles months mountain natural never operation pass plant possible pounds practical present produced railroad railway reached record result river road shows side soil stand success supply surface taken things thousand tion track train turn United