On the tendency of air and the different gases to mutual penetration : a probationary essay, submitted to the Faculty of Physicians and Surgeons of Glasgow / by Thomas Graham.

  • Graham, Thomas, 1805-1869.
Date:
1830
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Licence: Public Domain Mark

Credit: On the tendency of air and the different gases to mutual penetration : a probationary essay, submitted to the Faculty of Physicians and Surgeons of Glasgow / by Thomas Graham. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    of Science, New Series, vol. V.) The principal results contained in that publication, I shall shortly state, and then proceed to give an account of some more recent investigations into the same subject. ]. Gases diffuse into the atmosphere, and into each other, with different degrees of ease and rapidity. This was determined by allowing each gas, to difRise from a receiver into the air, through a narrow tube, taking care that when the gas was lighter than air, it was allowed to escape from the lower part of the ves- sel, and when heavier from the upper part, so that it had on no occasion any disposition to flow out, but was constrained to diffuse in opposition to the solicita- tion of gravity. In the first set of experiments, after diffusion for ten hours, the receiver containing at the outset 150 measures of gas, there remained, Qgjgg_ Sp. gr. Measures left in Escaped into the Air^l. the receiver. atmosphere. Hydrogen 0.0694 8.3 141.7 Carbureted hydr. 0.5355 56 94. Ammoniacal .... 0.59027 61 89. defiant 0.97220 77.5 72.5 Carbonic acid . . . 1.5277 79.5 71.5 Sulphurous acid . 2.2222 81 69. Chloi After four hours, out of 152 measures. Gases. Carbonic acid, Sulphurous acid. Left in tbe receiver. Escaped. . 123.9 n, 86 66. ... 89 . 63. . . 99 , 53. . 104 . 48. , 42. 36.