 ... from the fulcrum, and, at the same time, by its oblique action to raise or depress it, so as to furnish a means of bringing the points of support and the fulcrum into a right line. A piece of wire, four inches long, on which a screw is cut, proceeds...  Chemical and pharmaceutical manipulations - หน้า 102โดย Campbell Morfit - 1857 - 626 หน้ามุมมองทั้งเล่ม - เกี่ยวกับหนังสือเล่มนี้
 | Henry Kater, Dionysius Lardner - 1830 - 602 หน้า
...its oblique action to raise or depress it, so as to furnish a means of bringing the points of support and the fulcrum into a right line. A piece of wire,...at pleasure. The fulcrum, as before remarked, rests upon an agate plane throughout its whole length, and the scale-pans are attached to planes of agate... | |
 | 1831 - 358 หน้า
...oblique action, to raise or depress it, so as to furnish a means of bringing the points of support and the fulcrum into a right line. A piece of wire,...at pleasure. The fulcrum, as before remarked, rests upon an agate plane throughout its whole length, and the scale-pans are attached to planes of agate... | |
 | Henry Kater, Dionysius Lardner - 1831 - 390 หน้า
...so as to furnish i means of bringing the points of support and the fulcrum into a right line. • i A piece of wire, four inches long, on which a screw...screw, by changing the situation of which the place 01 the centre of gravity may be varied at pleasure. The fulcrum, as before remarked, rests upon an... | |
 | Henry Kater, Dionysius Lardner - 1852 - 408 หน้า
...proceeds from the middle of the beam downwards. This is pointed to serve as an index, and a sin all brass ball moves on the screw, by changing the situation...at pleasure. The fulcrum, as before remarked, rests upon an agate plane throughout its whole length, and the scale-pans are attached to planes of agate... | |
 | James Curtis Booth - 1862 - 1054 หน้า
...depress il.so as to furnish a means of bringing the points of suspension and the fulcrum into aright line. A piece of wire, four inches long, on which...at pleasure. The fulcrum, as before remarked, rests upon an agate plane throughout its whole length, and the scale-pans are attached to planes of agate,... | |
 | Henry Minchin Noad - 1864 - 494 หน้า
...furnish a means of bringing the points of support and the fulcrum into a right line. A piece of wire, 4 inches long, on which a screw is cut, proceeds from...at pleasure. The fulcrum, as before remarked, rests upon au agate plane throughout its whole length, and the scale-pans are attached to planes of agate... | |
 | Henry Minchin Noad - 1864 - 706 หน้า
...furnish a means of bringing the points of support and the fulcrum into a right line. A piece of wire, 4 inches long, on which a screw is cut. proceeds from...at pleasure. The fulcrum, as before remarked, rests upon an agate plane throughout its whole length, and the scale-pans are attached to planes of agate... | |
 | Henry Minchin Noad - 1864 - 694 หน้า
...points of support and the fulcrum into a right line. A piece of wire, 4 inches long, on which a screw ia cut, proceeds from the middle of the beam downwards....at pleasure. The fulcrum, as before remarked, rests upon an agate plane throughout its whole length, and the scale-pans are attached to planes of agate... | |
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