Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 272
rovided with a cross-wire, and capableof turning horizontally about an upright axis. The telescope carries roundwith it, over a circular table of non-conducting substance, a metallic pointerwhich presses against narrow slips of metal let into the circumference oftke table. To each slip of metal a… … Fig. io8.—Mode of Firing Torpedo. .corresponding piece of metal on the rim of the table. The mode in whichthese wires are connected with the torpedoes, the telescopes, and the elec-tric apparatus is shown by the lines in the diagram. At each station is akey, which interrupts the electric circuit…
Inventions
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