Science, Том 13Moses King, 1889 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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Стр. 34
... period . In our ordinary methods of artificial illumination we produce vibrations of a period that will affect the eye , by heating particles to incandescence , the resultant vibrations being of a great number of periods , only a few of ...
... period . In our ordinary methods of artificial illumination we produce vibrations of a period that will affect the eye , by heating particles to incandescence , the resultant vibrations being of a great number of periods , only a few of ...
Стр. 79
... period . Roughly , the period of a light - wave is 10 - 15 of a second , and we know of no way of producing electrical oscillations , on a conductor of finite size , of any thing near so rapid a period . When Hertz took the matter up ...
... period . Roughly , the period of a light - wave is 10 - 15 of a second , and we know of no way of producing electrical oscillations , on a conductor of finite size , of any thing near so rapid a period . When Hertz took the matter up ...
Стр. 141
... period of eleven years corresponding to that of terrestrial magnetism and of sunspots . It has recently been proved that the magnetical phenomena have a period of twenty - six days . This fact suggested to Mr. J. Liznar the plan of ...
... period of eleven years corresponding to that of terrestrial magnetism and of sunspots . It has recently been proved that the magnetical phenomena have a period of twenty - six days . This fact suggested to Mr. J. Liznar the plan of ...
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SINGLE COPIES TEN CENTS | 16 |
In Two Volumes Large 12m0 | 67 |
ELECTRICAL TESTING BUREAU | 92 |
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