The book Elements of Mineralogy volume 1 was written by author Richard Kirwan Here you can read free online of Elements of Mineralogy volume 1 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 volume 1 a good or bad book?
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Luftre, 2. Tranfparency, o. Fracture, fometimes ftreight, or curved, or divergingly flriated ; fometimes fmall or broad, ftreight or curved foliated *. Commonly with long- grained, more rarely with curved lamellar diftindt concretions. Fragments, 2; thofe of the lamellar variety affect a rhomboidal form. Streak, greenifh, or greyrfli green. Hardnefs, from 5 to 9, fcarcely reaching nine. Sp. Gr. Per Briflbn, from 2, 922 to 3, 3852, that of Lefke O. 1027, I found 3, 41. At the heat of 89 a piece ...of the above fpeci- men melted into a black folid glafs with grey fpots; at a lower heat it baked into a greenilh grey mafs, between a porcelain and an enamel. In the year 1783 I analyzed a piece of the foli- ated kind, and found it to contain 0, 37 filex, 0, 22 argill, 0, 16 magnefia, 0, 02 calx, (both the laft aerated, ) and 0, 23 of iron, not much oxyge- nated. * Itscrofsfra&ure, conchoidal, Lefke G. 297 Anraerk. P In 214 Argillaceous Genus. In 1787 Mr. Weigleb found another fpeciincn to contain 0, 4083 filex, 0, 175 magnefia, 0, 1666 calx, 0, 175 iron*.
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