An essay on phlogiston, and the constitution of acids / [Richard Kirwan].
- Richard Kirwan
- Date:
- 1787
Licence: Public Domain Mark
Credit: An essay on phlogiston, and the constitution of acids / [Richard Kirwan]. Source: Wellcome Collection.
139/154 (page 135)
![gives out more inflammable air than either of them. Steel is capable of more malleability, hard- nefs, and elafticity than malleable iron, gives out more inflammable air than crude iron, and contains lefs plumbago than crude, but more than malleable iron. The proportion of in¬ flammable air by meafure, in thefe 3 forts of iron, were found to be different both by Mr. Bergman, and Mr. Vandermond, Berthollet, and Mange, who repeated many of Mr. Berg¬ man’s experiments. C. Iron. Steel. Bar Iron. According to Bergman, too * gr, contain of inflam. air. ^ i 4° 4S 50 meafures According to the French] Academicians J 54 74 76 .* - The abfolute quantity of-' plumbago in ioo gr. ac¬ • 2,2 o,5 0,12 gr. cording to Bergman. j * Malleable iron is convertible into fteel, by ce¬ mentation with various fubftances, and particu¬ larly with charcoal, in a welding heat, and by this procefs it gains fome weight. Hence it is plain that plumbago is a factitious fubftance, fince it is formed in iron during cementation ; but its production, and the properties of iron in its different itates, are accounted for by the antiphlogiftians on principles very different from thofe of Mr. Bergman, and will form the fubjed of the following difcufiion. K 4 Accord-](https://iiif.wellcomecollection.org/image/b30793361_0139.jp2/full/800%2C/0/default.jpg)
