Nature, Volume 57Sir Norman Lockyer Macmillan Journals Limited, 1897 |
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Página 101
... taken at the Harvard College Observatory as part of the Henry Draper Memorial differ in two respects from those ordinarily taken elsewhere . Instead of using a spectroscope with a slit , in which but one star is photo- graphed at a time ...
... taken at the Harvard College Observatory as part of the Henry Draper Memorial differ in two respects from those ordinarily taken elsewhere . Instead of using a spectroscope with a slit , in which but one star is photo- graphed at a time ...
Página 173
... taken with the slit viewing the spark across the lines of force of the magnetic field . The electro - magnet being excited , we have the triplet marked 1. The current was then turned off , and 2 was taken , which shows the line in its ...
... taken with the slit viewing the spark across the lines of force of the magnetic field . The electro - magnet being excited , we have the triplet marked 1. The current was then turned off , and 2 was taken , which shows the line in its ...
Página 445
... taken at the Paris Observatory with exposures of an hour or less ( see p 374 ) A comparison of Mr. Wilson's photograph of the Orion nebula with one recently taken by Dr. Roberts with the same exposure shows that they both contain about ...
... taken at the Paris Observatory with exposures of an hour or less ( see p 374 ) A comparison of Mr. Wilson's photograph of the Orion nebula with one recently taken by Dr. Roberts with the same exposure shows that they both contain about ...
Índice
the Rinderpest Germ MM Nencki Sieber and Arctic Regions | 150 |
Moreau G Magnetic Torsion of Iron and Steel 524 SavilleKent 341 the Habits of IceSeals 346 Bulletin | 326 |
mining Vertical J Perchot and W Ebert 191 the Col | 430 |
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