 | Chemical Society (Great Britain) - 1900 - 1466 pages
...photographic purposes. We found that a burning surface of magnesium wire, which, seen from a point of the sea's level, has an apparent magnitude equal to that of the sun, effects, at that point, the same chemical action as the sun would do if shining from a cloudless sky at the... | |
 | 1864 - 332 pages
...of this light for the purpose of photography. They showedf that a burning surface of magnesium wire, which, seen from a point at the sea's level, has an...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 the visible... | |
 | 1864 - 648 pages
...light evolved by the combustion of magnesium wire. They showed that a burning surface of magnesium wire which, seen from a point at the sea's level, has an...above the horizon. On comparing the chemical with the visible brightness of these two sources of light it was found that the brightness of the sun's... | |
 | 1864 - 654 pages
...of this light for the purpose of photography. They showed fthat 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, effect.« on that point the same chemical action as the sun would do if shining from a cloudless sky... | |
 | HUGH W. DIAMOND, M.D., F.S.A. - 1866 - 516 pages
...evolved by the combustion of magnesium wire. They showed that a burning sur- ! face of magnesium wire which, seen from a point at the sea's level, has an...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... | |
 | Andrew Ure - 1867 - 1144 pages
...examination of this question. Their experiments fbowi.d t'-.at a burning surface of magnesium wire which, seen from a point at the sea's level, has an...magnitude equal to that of the sun, effects on that point tlie same chemical action as the sun would do when shining from a cloudless sky at a height of 9°... | |
 | Henry E. Roscoe - 1869 - 372 pages
...of this light for the purpose of photography. They showed1 that a burning surface of magnesium wire, which, seen from a point at the sea's level, has an...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 the visible... | |
 | Henry Enfield Roscoe - 1870 - 514 pages
...this light for the purpose of photography. They showed 1 that a burning surface of magnesium wire, which, seen from a point at the sea's level, has an...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 the visible... | |
 | sir Henry Enfield Roscoe - 1869 - 396 pages
...of this light for the purpose of photography. They showed1 that a burning surface of magnesium wire, which, seen from a point at the sea's level, has an...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 the visible... | |
 | Henry Enfield Roscoe - 1873 - 542 pages
...this light for the purpose of photography. They showed 1 that a burning surface of magnesium wire, which, seen from a point at the sea's level, has an...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 the visible... | |
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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... 
