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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    and fuses more easily than the grammatite from Fahlun (nearly like that Gullsjö) into a transpa- rent almost colourless glass. With borax fuses readily into a transparent glass. With salt of phosphorus intumesces, and does not wholly decompose, but is converted into a translucid mass, the central part of which retains its hardness. With soda fuses into an opaque glass, not rea- dily liquifiahle ; with a larger quantity it at first intumesces, hut afterwards in a strong heat fuses into a globule. With solution of cobalt fuses more difficultly, and only on the edges, into a fine dark blue glass. (6.) Black primitive hornblende, from Slätt- myra.1 Alone, scarcely intumesces, and fuses without the least bubbling into a black brilliant globule. With borax fuses into a glass strongly tinged by iron. - With salt of phosphorus not decomposed. The assay does not change colour, but becomes rounded on the edges. The vitrified flux exhibits a slight tint of iron. In this respect this mineral resem- bles The non-aluminous amphiboles. With soda fuses readily into a black brilliant sis, considers it as 1 atom of trisilicate of lime + 3 atoms of bisilicate of magnesia. C. 1 It contains 74 per cent, of alumina. (Hisinger, Afh. vi. 201.) 13.