Elements of Mineralogy Adapted to the Use of Seminaries And Private Students
Elements of Mineralogy Adapted to the Use of Seminaries And Private Students
J L John Lee Comstock
The book Elements of Mineralogy Adapted to the Use of Seminaries And Private Students was written by author J L John Lee Comstock Here you can read free online of Elements of Mineralogy Adapted to the Use of Seminaries And Private Students book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Elements of Mineralogy Adapted to the Use of Seminaries And Private Students a good or bad book?
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45 Tar 8. POLISHING SLATE. Polishing Slate, J. P. C. Ext. Char. Colors, white, yellowish white, or yel- low ; occurs massive ; structure slaty ; opake ; brittle ; swims on water for a short time. Comp. Silex 83. 50; alumirie 4; lime 8. 50 ; oxide of iron 1. 60; water 9. 0. Buchoh. Local. Bohemia, Saxony, and Auvergne. It is supposed to be a volcanic production. Use. It is used for polishing glass, marble, the metals, &c. Var. 9. GRAPHIC SLATE. Argile schisteuse graphique, H. Drawing Slate, J. B...lack Chalk, A. P. Graphic Slate, C. Ext. Char. Colors, black, greyish, or bluish black ; structure slaty ; fracture earthy ; leaves a black dull trace on wood, or paper ; opake ; soils the fingers : sp. Gr. 2. 14. Comp. Silex 64 ; alumine 11. 25; carbon 11 ; oxide of iron 2. 75 ; water 7. 5. Weiglib. It is found with argilite, and in the vicinity of coal formations. Local. Spain, France, Italy, Iceland, &, c. U. S. Rhode Island, with anthracite. On the Susquehannah, Penn. Uses. It is employed for tracing lines on wood, and for making crayons, for drawings.
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