The method of using the apparatus for exhibiting vibrations caused by heat, 1829. A description of a chemical vapour lamp furnace, 1834. And, an account of an experiment with chlorine gas, 1833 / by Arthur Trevelyan.

Date:
1850
Catalogue details

Licence: Public Domain Mark

Credit: The method of using the apparatus for exhibiting vibrations caused by heat, 1829. A description of a chemical vapour lamp furnace, 1834. And, an account of an experiment with chlorine gas, 1833 / by Arthur Trevelyan. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    the bar, the other into the ring—and are held fast by the pinching screws H.H.H. Care must be taken not to increase the heat of the bar to the melting point of lead, or the chances are, that the block will be fused at the point of contact. For continuous, or careful experiments, a spirit-lamp may be placed beneath the overhanging part of the bar, as at M. (fig. 1.) ; but, if the apparatus is large, it takes some time to raise it to a sufficient tempera- ture for producing the phenomena. In some experiments the heat of boUing water was employed with success, but a higher temperature is required to obtain the best results. In performing the experiment, the part of the block on which the bar rests should be slightly and newly roughened, and the contacting part of the bar smooth and bright. Therefore, before making the expe- riment, I always pass over the surface of the block, two or three times, a ^ne flat rasp ; and rub longitudinally, with a piece of Jine emeiy-paper, the surface of the bar, after it is heated for use; and it is advisable the manipulator should protect his hand from the heat, by wearing a wooUen glove. A paper was read on the Yibration of Heated Metals at the Meeting of the Bri- tish Asaociation, 1833; and published in the Literary Gazette same year. And papers on the same phenomenon will be found in the Transactions of the Koyal Society, Edinburgh, vol. xii. An. 1832; and,' by Professor Forbes, ibid. 1833; in the London and Edinburgh Philosophical Journal, vol. iii. p. 321, An. 1833; vol. vi. p. 85, An. 183.5; and, by Professor Forbes, in vol. iv. p. 15 and 182, An. 1831; also, a notice in the Elements of Chemistry, by Dr D. B. Reid, p. 659, An. 1839, &c.