Journal . g copper oxide, to ensurecomplete combustion of any unburnt gases, and finaUy? through calcium chloride and soda-hme tubes. Anyimused oxyen is collected in a gasometer and can beused over a.^ain. The space C between B and the woodencasiu is filled with eider-down. The silver-plated lid n nis made in two halves, one of which is provided with twosemicircular holes for a and b, a hole for the thermometer . of the manometer is connected with a spherical mercuryreservoir (r bv means of an india-rubber tube. The supportin which G is fixed works in a groove, and can be raisedor lowere
Journal . g copper oxide, to ensurecomplete combustion of any unburnt gases, and finaUy? through calcium chloride and soda-hme tubes. Anyimused oxyen is collected in a gasometer and can beused over a.^ain. The space C between B and the woodencasiu is filled with eider-down. The silver-plated lid n nis made in two halves, one of which is provided with twosemicircular holes for a and b, a hole for the thermometer . of the manometer is connected with a spherical mercuryreservoir (r bv means of an india-rubber tube. The supportin which G is fixed works in a groove, and can be raisedor loweretl. In carrying out a determination with thisthermometer, A is immersed in the space or substance thetempera re of wliich is to be ascertained, and G is thenraised t lowered till the surfaci^ of the mercury in Ctouches a platinum wire at p, which is fused into C as nearas possible to the opeuing of the tube B and on alevel with the zero point of the scale on X>. in doing so,the electric circuit b b is closed, and at the moment of con-tact the bell S ruigs. As soon as this occurs the supply ofmercury is shut off by means of the screw-valve i?, andthe height of the mercury in D read off. lieadiugs andthe corresponding temperatures of the gas in A arel)reviously calculated, tabulated, and confirmed by com-parison with the readings of a mercury thermometerbetween the limits + oU and — 30 C. The volu
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
