 | Walter Scott - 1823 - 786 pages
...extremity, by exposing it to a heat sufficient to cause the blue colour which arises again to disappear. V. That in the same plate of steel, of the size of a...other respect. 5. That polishing the needle has no effect on its magnetism. 6. That the best mode of communicating magnetism to a needle appears to be... | |
 | Charles Frederick Partington - 1828 - 468 pages
...middle to about an inch from each extremity, by exposing it to heat sufficient to cause the blue colour which arises, again to disappear. 4. That in the same...of steel of the size of a few square inches only, por-. lions are found varying considerably in their capability of receiving magnetism, though not apparently... | |
 | Thomas Curtis (of Grove house sch, Islington) - 440 pages
...inch from each extremity, by exposing it to heat sufficient to cause the blue color, which arises, to disappear. 4. That in the same plate of steel,...other respect. 5. That polishing the needle has no effect on its magnetism. 6. That the best mode of communicating magnetism to a needle appears to be... | |
 | Denison Olmsted - 1832 - 402 pages
...width, this form being found susceptible of the greatest directive force. 3. That the best method of tempering is first to harden the needle at a red heat,...other respect. 5. That polishing the needle has no * Phil. Trans. apparent effect on its magnetism. 6. That in needles from five to eight inches in length,... | |
 | Denison Olmsted - 1832 - 378 pages
...and then to soften it from the middle to about an inch from each extremity, by exposing it to beet sufficient to cause the blue color which arises, again...the needle has no apparent effect on its magnetism. C. That in needles from five to eight inches in length, their weights being equal, the directive forces... | |
 | Peter Mark Roget - 1832 - 324 pages
...Needles of cast steel were also tried, but were found so very inferior, as at once to be rejected. In the same plate of steel, of the size of a few square...though not apparently differing in any other respect. (229.) Captain Kater next endeavoured to determine the effects of various modes of hardening and tempering... | |
 | 1832 - 640 pages
...Needles of cast steel were also tried, but were found so very inferior, as at once to be rejected. In the same plate of steel, of the size of a few square...though not apparently differing in any other respect. (229.) Captain Kater next endeavoured to determine the effects of various modes of hardening and tempering... | |
 | 1832 - 650 pages
...Needles of cast steel were also tried, but were found so very inferior, as at once to be rejected. In the same plate of steel, of the size of a few square...varying considerably in their capability of receiving mag' netism, though not apparently differing in any other respect. (229.) Captain Kater next endeavoured... | |
 | 1832 - 642 pages
...Needles of cast steel were also tried, but were found so very inferior, as at once tit be rejected. In the same plate of steel, of the size of a few square inches only, portions aie found, varying considerably in their capability of receiving magnetism, though not apparently differing... | |
 | Royal Society (Great Britain) - 1833 - 502 pages
...dissipate the blue colour. The polish of the needle appears to have no effect upon its magnetism; but in the same plate of steel, of the size of a few square inches only, portions were found varying considerably in their power of receiving magnetism, though not apparently differing... | |
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That in the same plate of steel, of the size of a few square inches only, portions are found varying considerably in their capability of receiving magnetism, though not apparently differing in any other respect. 
