 Schyf, or mill, which revolves from two thousand to three thousand times per minute. The diamond is fixed in a ball of pewter at the end of an arm, resting upon the table in which the plate revolves ; the other end, at which the ball containing the diamond...  The American Journal of Science - Pàgina 1361854Visualització completa - Sobre aquest llibre
 | Society for promoting Christian knowledge - 1854 - 652 pàgines
...per minute. The diamond is fixed in a ball of. pewter at the end of an arm, resting upon the lable in which the plate revolves ; the other end, at which...the diamond is fixed, is pressed upon the wheel by nioveable weighls at the discretion of the workman. The weights applied vary from 2 to 30 Ibs., according... | |
 | John Timbs - 1856 - 304 pàgines
...fitted to an arm, one end of which rests upon the table in which the plate revolves, and the other, at which the ball containing the diamond is fixed, is pressed upon the plate by movable weights, varying, according to the size of the facets to be cut, from two to thirty... | |
 | Andrew Ure - 1860 - 786 pàgines
...which revolves from two thousand to thrre thousand times per minute. The diamond is fixed in a ball of pewter at the end of an arm, resting upon the table...the diamond is fixed, is pressed upon the wheel by movable weights at the discretion of the workmen. The weight applied varies from 2 to 30 Ibs. according... | |
 | Robert Hunt - 1862 - 1068 pàgines
...schyf, or rtiitt, and which revolves from 2000 to 3000 times per minute. The diamond is fixed in a ball of pewter at the end of an arm resting upon the table,...wheel by moveable weights at the discretion of the workmen. The weight applied varies from 2 to 30 Ibs. according to the size of the facets intended to... | |
 | Andrew Ure - 1867 - 918 pàgines
...which revolves from two thousand to three thousand times per minute. The diamond is fixed in a ball of pewter at the end of an arm. resting upon the table...the diamond is fixed, is pressed upon the wheel by movable weights ut the discretion of the workmen. The weight applied varies from 2 to 30 Ihs. according... | |
 | William Jones (F.S.A.) - 1868 - 360 pàgines
...mill, which turns from two thousand to three thousand times each minute. The diamond is fixed in a ball of pewter at the end of an arm resting upon the table in which the iron plate turns ; the other end, at which the ball containing the diamond is fixed, is pressed upon... | |
 | Edward Balfour - 1871 - 1146 pàgines
...revolves from 2000 to 3000 times per minute. The diamond is fixed in a ball of pewter, at the end of BO arm, resting upon the table in which the plate revolves...the diamond is fixed, is pressed upon the wheel by irou weights at the discretion of the workman. The diamond is cat by taking advantage of its cleavage,... | |
 | Edward Balfour - 1871 - 1146 pàgines
...the end of ID arm, resting upon the table in which the piste revolves ; the other end, at which lie ball containing the diamond is fixed, is pressed upon the wheel by iron weights at tie discretion of the workman. The diaffiad в eat by taking advantage of its cleavige,... | |
 | Georg Hartwig - 1871 - 578 pàgines
...minute, and is sprinkled over with diamond dust mixed with oil of olives. The diamond is fixed in a ball of pewter at the end of an arm resting upon the table on which, the plate revolves ; the other end, at which the ball containing the diamond is fixed, is... | |
 | Georg Hartwig - 1871 - 570 pàgines
...minute, and is sprinkled over with diamond dust mixed with oil of olives. The diamond is fixed in a ball of pewter at the end of an arm resting upon the table 011 which the plate revolves ; the other end, at which the ball containing the diamond is fixed, is... | |
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