Science, Том 18American Association for the Advancement of Science, 1891 Since Jan. 1901 the official proceedings and most of the papers of the American Association for the Advancement of Science have been included in Science. |
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... light which is a little greater than that of a first magnitude star , for the larger of these twin suns is ranked by Professor Gould as being ex- actly of the first magnitude of the photometric scale , and the smaller star is of the 3 ...
... light which is a little greater than that of a first magnitude star , for the larger of these twin suns is ranked by Professor Gould as being ex- actly of the first magnitude of the photometric scale , and the smaller star is of the 3 ...
Стр. 174
... light to vegetation should be understood , and wholly aside from any thought of introducing the light into greenhouses , its influence upon plants , both under glass roofs and in the open , is a question which demands careful ...
... light to vegetation should be understood , and wholly aside from any thought of introducing the light into greenhouses , its influence upon plants , both under glass roofs and in the open , is a question which demands careful ...
Стр. 241
... light . The explanation which had been suggested for the star's variability , that it was partially eclipsed at regular intervals of 68.8 hours by a dark companion large enough to cut off nearly five sixths of its light , was therefore ...
... light . The explanation which had been suggested for the star's variability , that it was partially eclipsed at regular intervals of 68.8 hours by a dark companion large enough to cut off nearly five sixths of its light , was therefore ...
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