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acres Alaska animals Bering Sea boat bridge building built canal Carey Act carried cent coal Coatesville concrete construction Copper River cost crop cylinder David Lubin device dollars eggs electric engine fact farm farmer feet fifty fish five four fruit gutta percha half heat hour hundred Idaho inches irrigation Island Kansas land light living Lubin machine means ment method miles million motor operation passed pipe plant POPULAR SCIENCE pounds produced pumping rail railroad river road Sabetha ship shows side sleeping sickness square miles station steam steel Sudan III superheater surface thing thousand tion town track trees trypanosomes tsetse fly twenty United vessel wall wheels wire wireless York York City