mechanical appliances mechanical movements and novelties of construction a complete work and a continuation as a second volume of the authors book entitled mechanical movements powers and devices including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries 46 metallic thermometer a series of rods or stripsof zinc and iron alternating with their alternate ends fastened together so that the first rod shall be zincand the last iron which shouldextend to a curved lever thatoperates a sector and small pin ion to which t 2cehxdd.jpg from 路易斯堡学院 mechanical manufacturing degree🔵网址：zjw211 com🔵 View Photo