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Scientific American, Vol. 15, No. 19 (1866) (1866)

leaf 3

An illustration from Scientific American, Vol. 15, No. 19 (1866), 1866, leaf 3
the annexed is hollow, or concave, and diagram, geometrically represent the force of the acts as aspring. The face terrestrial magnetism which is made the unit of di- of this chamber abuts on rective force. If an electric current be sent through a plate to which the the galvanometer coil, whose… … nine-inch gun and the Palliser chilled shot, express- force could now be suspended, the needle would ing the opinion that the London Times was not cor- point due east and west, but the combined action rect in deducing, from the penetration of the eight will direct it to the point, 1; this cuts the…

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