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Scientific American, Vol. 18, No. 7 (1868) (1868)

leaf 9

An illustration from Scientific American, Vol. 18, No. 7 (1868), 1868, leaf 9
d letters patent in the United If we lay the diagram down upon the table in such a posi- another subject. The question under discussion is, “How States and other countries, But we observe no patent grant- tion that A will be west, B north, C east, and D south, then many times does a wheel turn on… … C, and turn the shaft, D, until B is in the position of the shapeless, the chief power of which lay in their bases, hidden We will now start at A; 7 in the moving wheel is now west; dotted lines, th& tooth, E, wil! be at the top, having made from sight—strange creeping, mining forces, moving…

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