 | Friedrich Mohs - 1825 - 500 pages
...immediately, by their mutual scratching, but mediately, through the File, and determined accordingly. First we try, with a corner of the given mineral,...recourse to the file, and compare upon it the hardness of this degree, that of the next higher degree, and of the given mineral. Care must be taken to employ... | |
 | John Joseph Griffin - Crystallography - 1841 - 538 pages
...members of the scale, not immediately, by their mutual scratching, but mediately, through the file, and determined accordingly. " The process of this...recourse to the file, and compare upon it the hardness of this degree, that of the next higher degree, and of the given mineral. Care must be taken to employ... | |
 | John Joseph Griffin - Crystallography - 1841 - 536 pages
...members of the scale, not immediately, by then- mutual scratching, but mediately, through Ous file, and determined accordingly. " The process of this...recourse to the file, and compare upon it the hardness of this degree, that of the next higher degree, and of the given mineral. Care must be taken to employ... | |
 | John Joseph Griffin - Crystallography - 1841 - 548 pages
...the file, and determined accordingly. " The process of this determination is as follows: " First, wo try, with a corner of the given mineral, to scratch...recourse to the file, and compare upon it the hardness of this degree, that of the next higher degree, and of the given mineral. Care must be taken to employ... | |
 | Charles Upham Shepard - Mineralogy - 1852 - 268 pages
...members of the scale, not immediately, by their mutual scratching, but mediately through the jilt, and determined accordingly. The process of this determination...recourse to the file; and compare upon it the hardness of tbis degree, that of the next higher degree, and of the given mineral. Care must be taken to employ... | |
 | David Thomas Ansted - Geology - 1856 - 654 pages
...good condition, and the student, being provided with a fine, very hard, and well-tempered file, should try with a corner of the given mineral to scratch the members of the scale, beginning with the hardest. Having reached the first that is distinctly scratched, he must have recourse to the... | |
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... file, and determined accordingly. " The process of this determination is as follows: " First, we try, with a corner of the given mineral, to scratch the members of the scale, beginning from above, in order that we may not waste unnecessarily the specimens... 