The evolution of artificial mineral waters / by William Kirkby.
- Kirkby, William
- Date:
- 1902
Licence: In copyright
Credit: The evolution of artificial mineral waters / by William Kirkby. Source: Wellcome Collection.
Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.
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![as charcoal, but must theorise it into phlogiston. After producing fixed air by burning charcoal in dephlo- gisticated air, with a view to ascertain the quantities of the constituents, he says : Consequently, supposing the charcoal to be wholly phlogiston, as it is very nearly so, fixed air may be said to consist of 3'45 parts of dephlogisticated air and 1*5 phlogiston. So that the dephlogisticated air is more than three times [sic] the proportion of the phlogiston in it* The true explanation of the phenomena caused by fixed air, and of its properties and composition was at last furnished by Lavoisier, who in 1781 read his essayt upon its composition, the way for which had been prepared by his memoir upon the formation of acids, published in 1778. Distinguishing first between carbon, or ordinary charcoal, and carbonaceous matter, by which he meant carbon free from all impurities, he then passes on to prove that carbonic acid (thus named by him) is a compound produced by the combustion of charcoal in the oxigineous (acid forming) principle. He had previously shown that the oxygene enters into combination with sulphur and phosphorus when these elements are burnt in it, forming the sulphuric and phosphoric acids. After meeting with several difficulties in connection with obtaining charcoal sufficiently pure for his experiments, * Obseruaiions on Fixed Air. Birmingham, 1790. t Sur la formation de PAcidc, tiomvic' Air fixe ou Acidc Crayeux^ et que je designerai desorinais sous le notn d^Acide du Charbon.](https://iiif.wellcomecollection.org/image/b23983267_0078.jp2/full/800%2C/0/default.jpg)
