Pocket Manual of Mining; For the Use of Mining Men, Lawyers, Business Men, Prospectors, and Those Interested in the Mineral Resources of Canada

Pocket Manual of Mining; For the Use of Mining Men, Lawyers, Business Men, Prospectors, and Those Interested in the Mineral Resources of Canada

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 edition. Excerpt: ...Occasionally massive. C=grayish brown, ash gray, brown to black; sometimes pale yellow to green. S=uncolored. L=adamantine to resinous. Transparent to opaque. H=5--5.5. G= 3.4--3. 56. I n dark brown and black crystals, some iron replaces part of the calcium. B.B. fuses and bubbles. Imperfectly decomposed by hydrochloric acid. The thin wedge-shaped crystal is generally a distinguishing character. Silica 30.6, titanium oxide 40.82, lime 28.57. Common in Canada. STAURo1.ITrc.--Orthorhombic. Cleavage imperfect. Usually in cross-shaped twin crystals. Never massive or in slender crystallizations. (7=brown to black. L= vitreous, inclining to resinous, sometimes bright, but often dul1. Translucent to opaque. H= 7--7.5. G =3.4--3.8. B. B. infusible, excepting a manganese variety. Insoluble in acids. Distinguished from tourmaline and garnet by infusibility and form. Silica 28.3, alumina 51.7, iron oxide 15.8, magnesia 2.5, water 1.7. PEc'l'oL1TE.--Monoclinic. Usually in aggregations of needleshaped crystals, or fibrous-massive, radiate, star-shaped. C= white or grayish. Translucent to opaque. Tough. H =5. G= 2.86. B. B. fusible. In closed tube yields water. Decomposed by hydrochloric acid; solution gelatinizes on evaporation. Resembles fibrous varieties of tremolite, natrolite, wollastonite. Silica 54.2, lime 33.8, soda 9.3, water 2.7. Found in Canada. LAUMON'l'I'l'E.--Monocliuic, like pyroxene in form. Massive, with radiating or divergent structure, not fine fibrous. C=white, passing into yellow or gray, sometimes red. L=vitreous, inclining to pearly on cleavage face. Transparent to translucent. H = 3. 5--4. G=2.25--2.36. Becomes opaque on exposure through loss of water. and readily crumbles. B.B. swells up and fuses easily to...show more

Product details

  • Paperback | 46 pages
  • 189 x 246 x 3mm | 100g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236760557
  • 9781236760555