 | Cambridge Philosophical Society - 1898 - 628 pages
...The clip is then closed and air readmitted to the interior of the piston P by opening the tap T t . The piston then rises till the pressure in A only...pressure, then the pressure of the air before expansion is P^B-TT, where TT is the maximum vapour pressure at the temperature of experiment. The pressure of the... | |
 | 1899 - 594 pages
...open and there is thus free communication between the space inside P and the atmosphere, the plunger rises till the pressure in A only differs from the atmospheric pressure by an almost negligible amount, depending on the difference between the weight of the plunger and of the... | |
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The piston then rises till the pressure in A only differs from the atmospheric pressure by that required to support the weight of the piston, — a small fraction of a millimetre of mercury and negligible in these experiments. If B be the barometric pressure,... 