| Andrew Ure - Chemistry - 1821 - 418 pages
...hardness and specific gravity. The degrees of hardness are expressed by Mohs in the following manner : 1 expresses the hardness of Talc, 2 Gypsum, 3 .' Calcareous spar, 4 Fluor spar, 5 Apatite, 6 Feldspar, Quartz, 9 expresses the hardness of Corundum, 10 Diamond. Professor Mohs has arranged minerals in to... | |
| sir Richard Phillips - 1835 - 608 pages
...6. Unctuosity ; 7- Coldness; and, 8 Density. 1 expresses the hardness of talc ; 2 gypsum ; 3 cale, spar ; 4 fluor spar ; 5 apatite ; 6 feldspar ; 7 quartz ; 8 topaz ; 9 corundum 10 diamond. A simple rock is one unmixed homogc neous substance, whatever be its consti tuent elementary parts... | |
| John Frederic Daniell - Chemistry, Physical and theoretical - 1843 - 810 pages
...crystallized solid, and ending with the hardest. TABLE HI. Hardness. Degree. Standard of comparison. 1 Talc 2 ..... Gypsum 3 ..... Calcareous spar 4 ..... Fluor spar 5 ..... Apatite 6 Feld spar 7 ..... Quartz 8 Topaz 9 ..... Sapphire 10 ..... Diamond § 67. Elasticity is that property... | |
| Roswell Park - 1847 - 632 pages
...scratch any one of the preceding. The scale, thus constructed, is as follows: 1. talc; 2. rock salt; 3. calcareous spar; 4. fluor spar; 5. apatite ; 6. feldspar ; 7. quartz ; 8. topaz ; 9. sapphire ; and 10. diamond ; which is the hardest substance known. To these, Breithanpt has added two... | |
| La Roy Freese Griffin - Physics - 1886 - 326 pages
...rearrangement of the molecules. TABLE I.—SCALE OF HARDNESS. 1 Talc. 2 Rock Salt. 3 Calcspar. 4 Fluorspar. 5 Apatite. 6 Feldspar. 7 Quartz. 8 Topaz. 9 Corundum. 10 Diamond. TABLE II. —COMPARATIVE TENACITY OF DIFFERENT WOODS. This table gives the breaking load, in pounds,... | |
| Geology - 1920 - 128 pages
...and which is known as Moh's scale. It is as follows: (1) Talc, (2) Gypsum, (3) Calcite, (4) Pluorite, (5) Apatite, (6) Feldspar, (7) Quartz, (8) Topaz, (9) Corundum, (10) Diamond. The place which a mineral occupies in this scale is determined by the ease with which it scratches, or... | |
| S. P. Meads - Physics - 1894 - 298 pages
...degrees from one to ten, according to the following scale: 1. Talc. 2. Gypsum. 3. Calcite. 4. FluorSpar. 5. Apatite. 6. Feldspar. 7. Quartz. 8. Topaz. 9. Corundum. 10. Diamond. By comparison with this standard the hardness of any mineral may be ascertained. The color of the scratch... | |
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