They showed* that a burning surface of magnesium wire, which, seen from a point at the sea's level, has an apparent magnitude equal to that of the sun, effects on that point the same chemical action as the sun would do if shining from a cloudless sky... A Treatise on Chemistry - Pàgina 622per Henry Enfield Roscoe, Carl Schorlemmer - 1907Visualització completa - Sobre aquest llibre
| Chemical Society (Great Britain) - 1900 - 1466 pàgines
...the same chemical action as the sun would do if shining from a cloudless sky at the height of 9°53' above the horizon. On comparing the visible brightness...sun's disc, as measured by the eye, is 524-7 times aa great as that of burning magnesium when the sun's zenith-distance is 67°22', whilst at the same... | |
| 1864 - 332 pàgines
...shining from a cloudless sky at a height of 9° 53' above the horizon. On comparing the chemical with ike visible brightness of these two sources of light it...brightness of the sun's disc as measured by the eye when the sun's zenith distance was 67° 11', it 514-7 times as great as that of the burning magnesium... | |
| Literary and Philosophical Society of Manchester - 1864 - 1170 pàgines
...horizon. On comparing the chemical with PROCEEDINGS— LIT. & Tail.. SOCIETT— No. 12.— SESSION 1863-64 the visible brightness of these two sources of light...brightness of the sun's disc as measured by the eye when the sun's zenith distance was 67° 22', is 524-7 times as great as that of the burning magnosium... | |
| 1864 - 654 pàgines
...shining from a cloudless sky at a height of 9° 53' above the horizon. On comparing the chemical with the visible brightness of these two sources of light...brightness of the sun's disc as measured by the eye when the sun's zenith distance was 67° 22', is 524- 7 times as great as that of the burning magnesium... | |
| 1864 - 648 pàgines
...shining from a cloudless sky at a height of 9° 53' above the horizon. On comparing the chemical with the visible brightness of these two sources of light...brightness of the sun's disc as measured by the eye when the sun's zenith distance was 67° 22', is 524-7 times as great as that of the burning magnesium... | |
| Royal Institution of Great Britain - 1866 - 730 pàgines
...if shining from a cloudless sky at a height of 9° 53' above the horizon. On comparing the risible brightness of these two sources of light, it was found...524'7 times as great as that of burning magnesium wire when the sun's zenith distance is i>7 22' ; whilst at the same zenith distance the sun's chemical... | |
| HUGH W. DIAMOND, M.D., F.S.A. - 1866 - 516 pàgines
...at a height of 9° 53' above the horizon. On comparing the chemical with the visible bright- ! ness of these two sources of light, it was found that the...brightness of the sun's disc, as measured by the eye, when the sun's zenith-dis- j tance was 67° 22', is 524-7 times as great as that of tho burning magnesium... | |
| Andrew Ure - 1867 - 1144 pàgines
...shining from a cloudless sky at a height of 9° 58' above the horizon. On comparing the chemical with the visible brightness of these two sources of light,...brightness of the sun's disc, as measured by the eye when the sun's zenith distance was 67° 22', is 524'7 times as great as that of the burning magnesium... | |
| Henry Enfield Roscoe - 1870 - 514 pàgines
...effects on that point the same chemical action as the sun would do if shining from a cloudless sky at a height of 9° 53' above the horizon. On comparing...524-7 times as great as that of burning magnesium wire, when the sun's zenith distance is 67° 22'; whilst at the same zenith distance the sun's chemical... | |
| sir Henry Enfield Roscoe - 1869 - 396 pàgines
...effects on that point the same chemical action as the sun would do if shining from a cloudless sky at a height of 9° 53' above the horizon. On comparing...is 5247 times as great as that of burning magnesium wire, when the sun's zenith distance is 67° 22' ; whilst at the same zenith distance the sun's chemical... | |
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