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acres Alaska American Bering Sea boat boiler bridge building built canal Carey Act carried cent Chicago coal Coatesville concrete construction Copper River cost crop David Lubin device dollars eggs electric engine experiment farm farmer feet fish fruit give gutta percha heat hour hundred Idaho inches irrigation Kansas land light living Lubin machine means ment method miles million months motor Oliver Typewriter operation passed pipe plant POPULAR SCIENCE pounds practical produced profit protection pumping rail railroad river road Sabetha ship side sleeping sickness square miles station steam steel Sudan III surface Technical World Magazine thing thousand tion town track trees trypanosomes tsetse fly Typewriter United vessel wall wheels wire wireless York York City