The use of the blowpipe in chemical analysis, and in the examination of minerals / by J.J. Berzelius ; translated from the French of M. Fresnel, by J. G. Children. With a sketch of Berzelius' system of mineralogy; a synoptic table of the principal characters of the pure earths and metallic oxides before the blowpipe, and numerous notes and additions by the translator.

  • Berzelius, Jöns Jakob, friherre, 1779-1848.
Date:
1822
Catalogue details

Licence: Public Domain Mark

Credit: The use of the blowpipe in chemical analysis, and in the examination of minerals / by J.J. Berzelius ; translated from the French of M. Fresnel, by J. G. Children. With a sketch of Berzelius' system of mineralogy; a synoptic table of the principal characters of the pure earths and metallic oxides before the blowpipe, and numerous notes and additions by the translator. Source: Wellcome Collection.

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    nearly tliree times its original dimensions ; but the increase of volume only taking place on one side, the assay becomes curved, and rolls over ; at the same time it is converted into a black scoria. With the fluxes behaves like the preceding mineral. Remark.*—The varieties b and c appear to result from a mixture of the lithium-tourmaline with that species of tourmaline, which I have placed further on in the potassium family. 5. Lepidolite, from Rosœna, and Utö. (Lithion- glimmer.) ? 1 Alone, in the matrass, gives off water, which, if the heat be pushed to redness, is sensibly loaded with fluoric acid, yellows brazil wood paper, and dulls the glass here and there by the silica it de- posits on its surface. On charcoal intumesces and fuses very readily into a transparent, colourless, blebby glass globule. With borax fuses readily, and in large quantity, into a transparent glass. With salt of phosphorus decomposes and leaves a silica skeleton ; the globule becomes opaline on cooling. With soda fuses readily, with intumescence, into a slightly blebby transparent glass. With solution of cobalt becomes blue in fusing. 1 Professor C. Gmelin, of Thiibingen, found lithia and potassa in this mineral. If the difference between it and common mica be owing to its containing lithia, the presence of potassa may be derived from a mixture of common mica. IP