 | Edward John Chapman - 1843 - 260 lapas
...possible : 1. — Yields easily to the nail. 2. — Yields with difficulty to the nail, or receives merely an impression from it. Does not scratch a copper coin....scratch glass. 5. — Scratches glass, though rather difficultly, leaving its powder on it. Yields easily to the knife. 6. — Scratches glass easily. Yields... | |
 | Edward John Chapman - 1844 - 160 lapas
...OF MoHS. 1. Yields easily to the nail. . 2. Yields with difficulty to the nail, or receives merely an impression from it. Does not scratch a copper coin....not scratch glass. 5. Scratches glass, though rather difficultly, leaving its powder on it. Yields easily to the knife. 6. Scratches glass easily. Yields... | |
 | John Mitchell (F.C.S.) - 1846 - 450 lapas
...useful set of materials which are always present. This scale is of great value to the experimenter. 1. Yields easily to the nail. 2. Yields with difficulty...scratched by a copper coin ; does not scratch glass.* * Mr. Chapman has here omitted an important observation ; he has not stated what particular kind of... | |
 | 1860 - 612 lapas
...the nail. Does not scratch a copper coin. 3. Scratches a copper coin, but is also scratched by one, being of about the same degree of hardness. 4. Not...scratched by a copper coin. Does not scratch glass (ordinary window-glass). 5. Scratches glass very feebly. Yields easily to the knife. 6. Scratches glass... | |
 | Edward John Chapman - 1864 - 260 lapas
...the nail. Does not scratch a copper coin. 3. Scratches a copper coin, but is also scratched by one, being of about the same degree of hardness. 4. Not...scratched by a copper coin. Does not scratch, glass (ordinary window-glass). 5. Scratches glass very feebly. Yields easily to the knife. 6. Scratches glass... | |
 | Elizabeth Mayo - 1868 - 426 lapas
...difficulty to the nail, but does not scratch a copper coin, .... Rock salt. 3. Scratches a copper coin, and is also scratched by it, being of about the same degree of hardness, . Lime spar. 4. Not scratched by a copper coin, but not hard enough to scratch glass, . . . . . Fluor... | |
 | William Elderhorst - 1873 - 314 lapas
...other works on mineralogy. Among the distinguishing characters of minerals, their crystalline form, hardness, and specific gravity stand foremost. The...does not scratch glass. 5. Scratches glass, though with difficulty, leaving its powder upon it. Yields readily to the knife. 7. Does not yield to the... | |
 | William Elderhorst - 1874 - 340 lapas
...other works on mineralogy. Among the distinguishing characters of minerals, their crystalline form, hardness, and specific gravity stand foremost. The...does not scratch glass. 5. Scratches glass, though with difficulty, leaving its powder upon it. Yields readily to the knife. 6. Scratches glass easily.... | |
 | Pierre de Peyster Ricketts - 1876 - 210 lapas
...water and becomes opaque. 3ives off water and Puses. 3. Scratches and is scratched by a copper coin. 4. Not scratched by a copper coin; does not scratch glass. 5. Scratches glass with difficulty ; easily scratched with th<* knife. G. Scratches glass easily. Not easily scratched... | |
 | Pierre de Peyster Ricketts - 1876 - 203 lapas
...water and becomes opaque. Gives off water and Fuses. 3. Scratches and is scratched by a copper coin. 4. Not scratched by a copper coin; does not scratch glass. 5. Scratches glass with difficulty ; easily scratched with tho knife. 6. Scratches glass easily. Not easily scratched... | |
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Yields with difficulty to the nail, or merely receives an impression from it. Does not scratch a copper coin. 3. Scratches a copper coin ; but is also scratched by it, being of about the same degree of hardness. 4. Not scratched by a copper coin ; does... 
