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Scientific American, Vol. 36, No. 26 (1877) (1877)
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ontents into the wagon. The jib is detect the mixture of the two. For the latter purpose, no When exposed to sun and dry air the leaves become deep then swung round again, the scoop lowered, and the opera- tion repeated. blue; when the air is saturated with moisture they become certain and easy… … DUNBAR & RUSTON’S STEAM NAVVY. © 1877 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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