. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. 170 ELECTRIC POWER AND DEVICES. 408. SPRING BINDING POST. A quickmethod of changing electric-wire connections—press the spring and push in the wire. A most convenient binding PRESS DOWN

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