 | Royal Society (Great Britain) - 1833 - 486 Seiten
...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... | |
 | Denison Olmsted - 1854 - 620 Seiten
...exposing it to heat sufficient to cause the blue color which arises, again to disappear. 4. That ia the same plate of steel, of the size of a few square...magnetism. 6. That in needles from five to eight inches iu length, their weights being equal, the directive forces are nearly as the lengths. 7. That the directive... | |
 | Henry Minchin Noad - 1857 - 422 Seiten
...middle to about 1 inch from each end, by exposing it to a heat sufficient to cause the blue colour which arises again to disappear. 4°. That in the...differing in any other respect. 5°. That polishing a needle has no effect on its Magnetism. 6°. That the best mode of communicating Magnetism to the... | |
 | 1823 - 778 Seiten
...extremity, by exposing it to a heat sufficient to cause the blue colour which arises again to disappear. 1. 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... | |
 | 1821 - 588 Seiten
...extremity, by exposing it to a heat sufficient to cause the blue colour which arises again to disappear. That in the same plate of steel of the size of a few...though not apparently differing in any other respect. That polishing the needle has no effect on its magnetism. That the best mode of communicating magnetism... | |
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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. 
