The Astrophysical Journal, Volumul 10University of Chicago Press, 1899 "Letters to the Editor" issued as Part 2 and separately paged from v. 148, 1967. Beginning in 2009, the Letters published only online. |
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Pagina 15
... possible , it is only necessary to find and solve two independent equations involving P1 , P2 and known quantities . Neglecting perturbations , the work must be consistent with and involve the following fundamental theorems of parabolic ...
... possible , it is only necessary to find and solve two independent equations involving P1 , P2 and known quantities . Neglecting perturbations , the work must be consistent with and involve the following fundamental theorems of parabolic ...
Pagina 31
... possible to the proper radius ( this JOURNAL , March 1898 ) . By adjusting grating and plate - holder so as to make them . parallel , the second order spectrum was found to be " normal . " These adjustments were very easily made ...
... possible to the proper radius ( this JOURNAL , March 1898 ) . By adjusting grating and plate - holder so as to make them . parallel , the second order spectrum was found to be " normal . " These adjustments were very easily made ...
Pagina 34
... possible to measure the wave - lengths with the accuracy shown in the accompanying table . In fact , in the fainter images of the spectrum , this double bright line was about all that appeared . In the following table , in column I is ...
... possible to measure the wave - lengths with the accuracy shown in the accompanying table . In fact , in the fainter images of the spectrum , this double bright line was about all that appeared . In the following table , in column I is ...
Pagina 40
... possible that the law derived by W. Wien 3 represents the emission of " the absolutely black body . " In Wien's formula , J = c1λ = 5e C 2 XT , ( I ) where Jd is the energy between wave - lengths λ and λ + dλ at the absolute temperature ...
... possible that the law derived by W. Wien 3 represents the emission of " the absolutely black body . " In Wien's formula , J = c1λ = 5e C 2 XT , ( I ) where Jd is the energy between wave - lengths λ and λ + dλ at the absolute temperature ...
Pagina 42
... possible . I adopted the latter method and beg to show in what follows how far I have been able to approach to my aim . The experiments I communicate refer to the region of low tem- peratures and long wave - lengths . These experiments ...
... possible . I adopted the latter method and beg to show in what follows how far I have been able to approach to my aim . The experiments I communicate refer to the region of low tem- peratures and long wave - lengths . These experiments ...
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absorption aperture apparatus appear astronomers ASTROPHYSICAL JOURNAL axis bands blackening Board of Visitors bolometer bright lines brighter camera carbon catalogue cents chromosphere cluster Coin comparison compound spectrum corona corresponding curve density determined diameter disk displacement eclipse electrodes employed equal error exposure faint stars Fe lacking focal length given gives Harvard College Observatory hydrogen lines inches instrument intensity investigation Keeler Lick Observatory light line of sight luminosity magnitude maximum mean measured mercury vapor Messier 13 metallic meteors micrometer mirror Morris Travers Naval Observatory objective observations obtained orbit oxygen photographs photometric Pickering plate position Potsdam pressure prism Professor radiation rays refractor region ring nebula Scheiner screw slit spark spectra spectrograph spectroheliograph spectroscope stellar telescope temperature tenth-meters tion trum tube University of Chicago Ursae vanadium Variable Stars Variable Velocity visual W. W. Campbell wave-lengths wedge Widely separated Yerkes Observatory
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Pagina 49 - EMGs were sampled with surface electrodes for ten revolutions at the beginning, in the middle and at the end of each work...
Pagina 272 - When an appointment or detail is to be made to the office of astronomical director, director of the Nautical Almanac, astronomer, or assistant astronomer, the board of visitors may recommend to the Secretary of the Navy a suitable person to fill such office, but such recommendation shall be determined only by a majority vote of the members present at a regularly called meeting of the board held in the city of Washington.
Pagina 197 - The officers of the Society shall consist of a President, two Vice Presidents, a Secretary...
Pagina 197 - Society to serve for a period of one year, and two members shall be chosen annually to serve for a period of two years or until their successors are duly elected and qualified.
Pagina 272 - The board of visitors shall prepare and submit to the Secretary of the Navy regulations prescribing the scope of the astronomical and other researches of the Observatory and the duties of its staff with reference...
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