The early history of chlorine : papers / by Carl Wilhelm Scheele (1774), C.L. Berthollet (1785), Guyton de Morveau (1787), J.L. Gay-Lussac and L. J. Thenard (1809).

Date:
1905
Catalogue details

Licence: In copyright

Credit: The early history of chlorine : papers / by Carl Wilhelm Scheele (1774), C.L. Berthollet (1785), Guyton de Morveau (1787), J.L. Gay-Lussac and L. J. Thenard (1809). Source: Wellcome Collection.

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    ON MANGANESE And its Properties. By Carl Wilhelm Scheele.* ***** Behaviour of Manganese with common Marine Acid. 6. (a) One ounce of pure spiritus satis was poured on half an ounce of finely-ground manganese. After this mixture had stood one hour in the cold, the acid had assumed a dark brown colour. Part of this solution was poured into a bottle, which was left open in a warm place. The solution gave off a smell like warm aqua regis, and after a quarter of an hour it was clear and colourless as water, and the smell was gone. (b) The remainder of the brown mixture was set to digest, in order to see whether the marine acid would saturate itself with man- ganese. As soon as the mixture became warm, its smell of aqua regis became considerably augmented, and an effervescence also arose, which continued till the follow- ing day, when the acid was found to be saturated. On the residue which it had been unable to dissolve, there was again poured one ounce of spiritus satis, where- upon all the above-mentioned phenomena occurred, and the manganese became completely dissolved, except a little siliceous earth. ***** 23. The sixth paragraph shews the behaviour of man- ganese with marine acid. In this case it is not so easy * [Translated from “Om Brunsten, eller Magnesia, och dess Egen- skaper,” Kong. Vetenskaps Academiens Handlingar, xxxv., pp. 89, 93, 94, 105-110. Stockholm, 1774.]