. Carnegie Institution of Washington publication. INVESTIGATION WITH A ROCK-SALT PRISM. 41 in a state sufficiently pure for this work. Not being satisfied with the usual washing in bromine water, and liquefaction method, the gas- ometer was placed in series with a wash-pipette of fuming sulphuric acid, and the gas washed back and forth half an hour, after which only a suspicious trace of ethylene remained, as will be noticed at ^ in the absorption curves. The Absorption Cell. The absorption cell for gases is shown in fig. 10, Two glass cells were used, in length and cm., diameters
. Carnegie Institution of Washington publication. INVESTIGATION WITH A ROCK-SALT PRISM. 41 in a state sufficiently pure for this work. Not being satisfied with the usual washing in bromine water, and liquefaction method, the gas- ometer was placed in series with a wash-pipette of fuming sulphuric acid, and the gas washed back and forth half an hour, after which only a suspicious trace of ethylene remained, as will be noticed at ^ in the absorption curves. The Absorption Cell. The absorption cell for gases is shown in fig. 10, Two glass cells were used, in length and cm., diameters and cm., capacity cc. and cc, respectively. The rock-salt windows were split from the natural crystal, which gave smooth, plane surfaces which were not attacked by moisture,. and lasted throughout the work of two months. The windows were attached with Le Page's glue, which became exceedingly hard on drying, and had such a low vapor pressure that no absorption bands could be detected, even after exhausting the cell to mm. and per- mitting it to stand four days. One of the vapors to be expected from it would have been acetic acid. Before filling the cell with a new gas It was always washed out thoroughly with air. This was done by means of a water aspirator attached to the pump, the cell being exhausted from five to seven times, each time allowing it to fill with air. The final exhaustion was carried to mm., and the absorption of the cell, thus exhausted, was found each time before filling it with a new gas. Only. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
Size: 1883px × 1327px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1900, bookyear1905
