. 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. , SPRINGS. 41 52. SUNSHINE RECORDING THERMOMETER. Extend-ing from the instrument in the room through the roof is an iron pipe. On its upper end it carries aniron bar, b, to which is fastenedfirmly, at c, the metalhc ther-mometer bar, d; from the looseend of this bar a
. 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. , SPRINGS. 41 52. SUNSHINE RECORDING THERMOMETER. Extend-ing from the instrument in the room through the roof is an iron pipe. On its upper end it carries aniron bar, b, to which is fastenedfirmly, at c, the metalhc ther-mometer bar, d; from the looseend of this bar a fine wiredescends over a guide pulleydown the inside of the pipe tothe lever, ^, in the case in theroom below. On the long endof the lever is an ink pencil, f^that records the motions of the thermometer bar on the register sheet,gg^ which is fastened by means of two small clamps to the board thatis carried sideways by the clock, //. Over the metallic thermometerbar above the roof is a glass shade, /, protecting it from the weather,or covered with a louver box when used for recording temperature the register paper, g g, are shown the fluctuations for the this instance many clouds have passed between the sun and instru-ment. If the curve had been without oscillations it would show thatthe day had been 53. CENTRIFUGAL SPEED INDICATOR. Gravity of acolored fluid in the central and outer tubes is varied by the centrif-ugal force of revolution for a constant in-dicator. The machine consists of three tubes, a, byb^, which connect freely with one another,and are mounted vertically between conicalcenters. The tubes are sealed air tight sothat no liquid can escape or be added. Ascale is placed on a standard opposite thecentral glass tube, and is graduated to cor-respond to various speeds. When the ap-paratus is set in motion, the level of the col-ored liquids falls in the central tube a, andrises in b, and b^; by comparing the level ofthe liquid in a with the scale
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
