The blowpipe vade macum : the blowpipe characters of minerals deduced from the original observations of Aquilla Smith ; alphabetically arranged and edited by Samuel Haughton and Robert H. Scott / [Aquilla Smith].

  • Aquilla Smith
Date:
1862
Catalogue details

Licence: Public Domain Mark

Credit: The blowpipe vade macum : the blowpipe characters of minerals deduced from the original observations of Aquilla Smith ; alphabetically arranged and edited by Samuel Haughton and Robert H. Scott / [Aquilla Smith]. Source: Wellcome Collection.

    24/76 (page 16)
    [Allanite.—In forceps fuses readily into a black bead ; with borax dis- solves readily into a transparent bead coloured with iron; with salt of phosphorus fuses into a transparent bead coloured with iron ; on adding nitre, the bead becomes semi-opaque when cold, pearl-grey colour.—Ed.] Allochroite (^Vide Garnet). (Th. 147; Al. '201).—Virums Iron Works, near Drammen, Norway. Resists the knife. In the forceps fuses readily into a brilliant black globule, not magnetic. No water. With borax emits a few bubbles; and fuses rather slowly into a glass, coloured by iron. Allophane (Th. 243 ; Al. 73).—Moldawa, Ranat. Of pale bluish-green colour. Yields easily to the knife ; streak white. In the forceps becomes white; colours the flame behind the assay green for a long time; and, in a good blast, fuses on the edge into a white enamel. With cobalt it becomes blue. Contains much water. With borax effervesces a little at first; and dissolves rather readily into a clear glass of a pale blue colour when cold. Does not gelatinize in nitric acid. Mr. Allan says, “in acid it gelatinizes.” Alumina, Hydrated ( Diaspore ; Gibbsite). (Th. 221; Al. 307).— Richmond in Massachusetts, N. America. A^ields easily to the knife. In the forceps is infusible; becomes very white. Contains much water. Infusible with borax; with cobalt a beautiful blue. Ex- tremely rare. Amphibole, Foliated ( FiJe Hornblende). (Th. 198; Al. 145).—Aren- dal, Norway. Hardness = 4-5. Streak greenish. In the forceps fuses readily into a shining black globule, not magnetic, with scarcely any effervescence. No water. In borax emits a few bubbles; coloiu’s the glass with iron; and dissolves rather slowly. No manganese. Amphodelite(Fft/eAnorthite).—(Th. 269).—Lojo, Finland. Hardness about = 4-5 ; streak white. In the forceps it whitens and effervesces a little; some parts of it fuse more readily, and with more effer- vescence than others, into a white blebby bead, rendered transpa- rent in a stronger heat. No water. With borax emits a few bub- bles at first, and fuses slowly into a colourless glass. No manganese. Analcime (Th. 337; Al. 115).—Downhill, Londonderry. Hardness about = 5-5 ; scarcely yields to the knife. In the forceps when gently heated it becomes white apd opaque, and fuses rather slowly into a colourless globule, slightly vesicular. [Very fusible ; glassy bead ; flame indicates much soda.—En.] Contains water. AVith borax dissolves rather sloAvly into a colourless glass. Does not gelatinize with nitric acid. It becomes so transparent when stiongly heated with the borax, that it appears to dissolve quicker than it really does. Anatase(F^■^^eBrookite; RutUe). (Ph.'^; 253).—Dauphine. Hardness = 5'3 ; streak white. In the forceps it is infusible. AA' ith borax it dis- solves slowly ; when a very small proportion is dissolved, the glass is transparent and colourless when warm, on cooling it becomes reddish amethyst coloui' by transmitted Hght, and muddy reddish by re- • An Elementary Introduction to Mineralogy. By William Phillips, i'ourtli Edi- tion, by Robert Allan. 1 vol. 8vo. London, 1837.