. Preventive medicine and hygiene. an Orsat tube con-taining a strong solution (20 per cent.) of potash, which absorbs theCO2. The air is then returned to the gas buret and remeasured forloss in volume. Great care must, of course, be exercised that the pres-sure and temperature are precisely the same before and after absorp-tion. The gas buret A, Fig. 82 is first filled with mercury by raisingthe reservoir E. The sample to be analyzed is then drawn into A by low-ering E. There must always be a drop of water on the surface of themercury and also in the compensating cylinder C. In this way theai
RM2AFJCTX. Preventive medicine and hygiene. an Orsat tube con-taining a strong solution (20 per cent.) of potash, which absorbs theCO2. The air is then returned to the gas buret and remeasured forloss in volume. Great care must, of course, be exercised that the pres-sure and temperature are precisely the same before and after absorp-tion. The gas buret A, Fig. 82 is first filled with mercury by raisingthe reservoir E. The sample to be analyzed is then drawn into A by low-ering E. There must always be a drop of water on the surface of themercury and also in the compensating cylinder C. In this way theai