Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 411
COIL AND FIG. 3. THE REFLECTING GALVANOMETER. fastened to a piece of hard rubber. Fig. 1 repnsents a front view of the hollow cylindrical bolbin, B, r;. In the centre is the lens, L, and bihind the lens is the mirror, 11. Now, supposthis figure is cut through at the dotted line, anthe inside…
Children's literature
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