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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    With borax fuses easily, and with brisk effer- vescence, into a transparent glass. With salt of phosphorus fuses easily, with effer- vescence, into an opaline glass, and leaves a trans- parent siliceous skeleton. With soda intumesces, and changes into a white, semi-fused scoria. With solution of cobalt gives a very pale red colour. (b) . White opaque talc, from the valley of Fenestrolle. Behaves like the preceding, except that it effer- vesces less with the fluxes. (c) . Translucid greenish talc, from Skyttgrufwa, near Fahlun. Alone, in the matrass, no trace of water, clears a little on the edges, but does not lose its transpa- rence by a moderate ignition. In a stronger heat it whitens, becomes scaly and rounded on the edge into a white, blebby mass. With borax fuses, with effervescence, into a transparent glass, which, whilst hot, is tinged with iron. A portion resists solution at first, but after- wards fuses very slowly without effervescence. With salt of phosphorus decomposes easily; gives an almost transparent skeleton of silica, and an opaline glass. With soda intumesces, and fuses into an opaque, difficultly liquefiable glass, which may be obtained clear with a certain proportion of soda. In general, this glass absorbs a large quantity of it.