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金虫 (小有名气)

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专业: 中药学其他科学问题

[求助] 装置求助

请问有人知道这个装置具体怎么用么？
在一篇文献中看到的，可是文献中说的不是很清楚。下面是对这个装置的描述

FIG. 1. Vessel employed in density measurements. The capillary A contained a small float, tube B the (diluted) sample of combustion water, and tube C an ampule of purified tap-water for calibration of the float. S, outlet to pump.

　　　A vessel (see Fig. 1) contained a small float (8 mm. X 0.6 mm.) in the capillary A, the ampule of combustion water in B, and an ampule of purified tap water in C. This vessel was evacuated and sealed at S, the water in C released by immersion in dry ice-ether which shatters the ampule, and the water distilled into A. The temperature at which the float remains motionless was observed(or calculated by a small extrapolation at a temperature in that neighborhood from the observed velocity of the float). The water was distilled back to C and this arm of the vessel sealed off. By a similar procedure the flotation temperature of the combustion water in B was determined and the excess in density, with respect to purified tap water, obtained from the observed temperature difference

图片1.png

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