. 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. e of the wheel, A, in the direction shown by the arrow, and this wheel carries along theintermediate one, B, which transmitsmotion to the inner-toothed wheel, latter is connected with the machineto be experimented upon by the axle, c,and the Cardan joint, c\ The
. 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. e of the wheel, A, in the direction shown by the arrow, and this wheel carries along theintermediate one, B, which transmitsmotion to the inner-toothed wheel, latter is connected with the machineto be experimented upon by the axle, c,and the Cardan joint, c\ The axles, a and <:, revolve in bearingsfixed to the frame, M, but the axle of thewheel, B, revolves in a bush which iscarried by a beam whose fixed axis passesexactly through the contact of the cir-cumferences of the wheels, A and result of this is, that the momen-tum of the force exerted by the wheel,A, upon B, is null with respect to theedge of the knife-blade upon which thebeam oscillates, and that, consequently,such force has no tendency to move thebeam in one direction more than in another. The beam, then, is onlyinfluenced by the resistance that the wheel, C, offers to the motion ofthe wheel, B ; and it is such resistance that, by a system of levers in aratio of i to 10, is measured by means of the weight, 57. THERMOHYDROSCOPE. The instrument comprises es-sentially a double spiral, S, of zinc and iron and a prepared strand, H, of hair, extending from the end, a^ of thespiral, through an eye, r, over the roller,O, to the end of the index, Z. The eye,r, is carried by the spring,/, and is raisedor lowered by means of the set-screw, the eye be lowered, the strand of hairis subjected to tension, and the index, Z,thereby raised. If the eye be raised, thestrand of hair is slackened, and the in-dex falls by its own weight. In thismanner the index of the instrument isadjusted. The spiral, S, operates in the same manner as the spiral of a ther-
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
