Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 324
It will be useful to the student to remember as a general fact, that supposing. Fig. 2695, the obscn-erto be facing the north, N, and the helix A B placed transversely before him so that its axis may lieeast and west, then if the current be desvending the coils of the spiral directly before him,…
Mechanical engineering · Mechanics · Engineering
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