Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity (1854)
Davis, Daniel · Boston : Palmer and Hall · leaf 221
k-work annexed, for carrying the paper, in themanner already described in connection with theelectro-magnetic telegraph. The coils of the axial 204 D AVI S S MANUAL. apparatus are partly seen at M. The large scroll ofpaper is shown at S, with the strip, P P, proceedingfrom it. The arrangement for… … moved by an axial engine, driven by a small localbattery, and set in action, if desirable, by the com-pletion of the circuit of the telegraph. The softiron bar of the telegraphic apparatus is seen at A,and that of the engine at M. There is a peculiararrangement added for commencing and…
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