Abstract
A short time before the lecture I had an opportunity of inspecting the apparatus of Mr. Sinclair, which has been tested and highly spoken of by the superintendent of the Manchester Fire Brigade. The original idea is due to Von Humboldt, who proposed it for the Hartz mines. Galibert constructed the apparatus in an improved form, and it has been still further improved by Mr. Sinclair, who has purchased Galibert's patent. It consists of an air-tight bag, from which issue two tubes that unite on a single one with a respirator mouth-piece. The bag is filled with air, and the wearer inspires through one valve and expires through another. The expired breath is carried to the bottom of the bag, and is stated to remain there in consequence of the chilling experienced in its passage downwards. A bag of not inordinate size is stated to be sufficient to supply a man with air for twenty minutes. Mr. Sinclair's apparatus was exhibited during the lecture.
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T., J. Dust and Smoke. Nature 4, 128 (1871). https://doi.org/10.1038/004128a0
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DOI: https://doi.org/10.1038/004128a0