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.

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    Antimony, sulphuret of, compact variegated.—Golcleronach, near Bay- renth, Franconia. Decrepitates violently when lieated; but when reduced to powder and moistened, it affords same pyrognostic clia- racter as the last. Antimony, white (Ph. 348 ; Th. 83).—Very rare. Yields very easily to the laiifc. Heated on charcoal, it decrepitates a little; fuses speedily into a fluid globule ; volatizes 'v\ ithout odour, and deposits white sublimate. On the charcoal a drop of hydrosulphurct of am- monia added to the white sublimate converts it to an orange-yellow colour after a few minutes. Apatite ( Asparagus Stone, laime. Phosphate of). (Th. 124; Al. 27).—Ehrenfriedersdorf, Saxony. In the forceps fuses with some difficulty on the edge. Ho water. With borax luses very slowly into a colourless glass, which becomes opaque by flaming, when only a small quantity of the assay is dissolved. [Apatite.—Dalkey. In the forceps infusible, glows brilliantly. With borax, dissolves slowly; bead clear in reducing flame, becomes opaque in the ordinaiy flame, and coloured by manganese.—En.] Apophyllite ( Vide Albin). (Th. 352; Al. 129).—Ivarartut, Disko Island, Greenland. Hardness about = 5-0. In the forceps, at a low heat, it becomes white, exfoliates, intumesces much, and fuses readily with effervescence into a blebby globule, colourless. Contains much water. With borax it effervesces at first, and fuses readily into a colourless glass, which, when saturated, I could not render opaque by flaming. Berzelius says it becomes opaque by flaming. With acetate of cobalt it melts into a blue glass ; reduced to powder, it gelatinizes with nitric acid. Arendalite (Fide Epidote). (Th. 364; Al. 150).—Arendal, Norway. Ilesists the knife. In the forceps intumesces and effervesces, and fuses into a scoria, which, in a strong heat, is converted into a shining black globule, not magnetic. Contains no water. With borax fuses readily into a glass coloured by iron. Arragonite. Kanniok, Greenland. Effervesces briskly Avith muriatic acid. In forceps does not fall to powder; infusible. Ho water. With botax dissolves speedily. Arragonite, fibrous.—Cornwall. With nitrate of potash gives indica- tion of manganese. Contains F03 per cent, of manganese. Arragonite, macled (Th. 117; Al. 30).—Molina, Anngon, Spain. Ef- fervesces briskly with muriatic acid. In the forceps it becomes white, falls to powder immediately on being heated, and is infusible. Con- tains no water. With borax it fuses speedily with much effeia-es- cence into a coloiuless glass, which becomes opaque by flaming if a larger portion be added. Arsenic, native (Ph. 280; Th. 79).—Idria, Camiola. Its fresh fracture presents a tin-white appearance, but it very soon tarnishes on ex- posure to the air. Hardness about = 3-5. Streak metallic. Heated on charcoal, it emits copious greyish fumes of strong arsenical odour, and is entii’ely volatilized. Arsenic, red sulphuret cf ( Vide Realgar). (Ph. 281; Th. 81).—Tran-