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C. W. Hinman—New Apparatus for Gas Analysis. 185 
15 mm. above the top of 2. The measuring tube being thor- 
oughly cleansed, and a drop of water spread over the sides, is 
fixed in the clamp; a thin slice of cork being placed between 
each side of the clamp and the tube. The tube is then placed 
upright in a small, long-handled cup of mercury, like that used 
by Doyére, and is lowered through the water into the mercury 
well. The piece c is then put over 4, and fixes i i 
the rod f A clean pipette, full of mercury, is then lowered 
into the trough and the point brought directly under the meas- 
uring tube, which is then lowered so that the pipens touches 
the top of the measuring tube. The bottle p is p aced on the 
table, the screw clip g loosened and the air is forced over into 
the bulb o of the pipette. When the pipette tube has become 
i be is 
opening the clip g. If desirable, the gas can be bubbled di- 
rectly into the measuring tube by means of a properly bent tube. 
Vhen as much gas as is desired is in the measuring tube, the 
