 | Astronomy - 1858 - 404 pages
...proportion to the illuniinating_rays. Anothex_curious_ fact^ jwhich he thought he had well made out, is, that those portions of the lunar surface which are illuminated by a very oblique ray_ frpm__ihe sun, do not produce an equal effect on the~I5hsitive plate, though they are equally... | |
 | Industrial arts - 1859 - 450 pages
...proportion to the ^luminating rays. Another curious fact, which he thought he had well made out, is, that those portions of the lunar surface which are...plate, though they are equally bright to the eye. Such a phenomenon obtains during the afternoon in terrestrial photography, when the sun's rays reach... | |
 | Industrial arts - 1859 - 448 pages
...lie thought ho had well made out, is, that those portions of the lunar surface which aro fflummated by a very oblique ray from the sun, do not produce...an equal effect on the sensitive plate, though they arc equally bright to the eye. Such a phenomenon obtains during the afternoon in terrestrial photography,... | |
 | Industrial arts - 1859 - 478 pages
...eurions faet, whieh ho thonght he had well made ont, is, that those portions of the lunar surfaee whieh are illuminated by a very oblique ray from the sun, do not produee an equal effeet on the sensitive plate, thongh they are equally bright to the eye. Sueh a phenomenon... | |
 | Literary and Philosophical Society of Manchester - Natural history - 1864 - 1170 pages
...Professor Secchi, has been pointed out by Mr. De la Rue, namely, that those portions of the moon's surface which are illuminated by a very oblique ray from the sun possesses so little photogenic power, that, although to the eye they appear as bright as other portions... | |
 | William Laxton - Architecture - 1866 - 466 pages
...Professor Secchi, has been pointed out by Mr. De la Rue, namely, that those portions of the moon's surface which are illuminated by a very oblique ray from the sun possess so little photogenic power that, although to the eye they appear as bright as other portions... | |
 | Astronomy - 1867 - 346 pages
...Professor Sccchi, has been pointed out by Mr. De la Rue, namely, that those portions of the moon's surface which are illuminated by a very oblique ray from the sun possess so little photogenic power that, although to the eye they appear as bright as other portions... | |
 | Photography - 1866 - 640 pages
...Professor Secchr, has been pointed out by Mr. De la Kue, namely, that those portions of the moon's surface which are illuminated by a very oblique ray from the sun, possess so little photogenic power that, although to the eye they appear as bright as other portions... | |
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Sccchi, has been pointed out by Mr. De la Rue, namely, that those portions of the moon's surface which are illuminated by a very oblique ray from the sun possess so little photogenic power that, although to the eye they appear as bright as other portions... 