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 62
... reading on the position circle of the Nicol prism for the fainter star was about 12 ° , therefore for the brighter star it did not exceed 40 ° , as no differences greater than 2.5 magnitudes occurred . The observations of the standards ...
... reading on the position circle of the Nicol prism for the fainter star was about 12 ° , therefore for the brighter star it did not exceed 40 ° , as no differences greater than 2.5 magnitudes occurred . The observations of the standards ...
Pagina 83
... Readings were then taken at frequent intervals of the deflections of the radio-micrometer, and simultaneously the temperature of the enclosure. TABLE I. T' absolute J.3I7 1,266 1,206 1,193 1,161 1,105 1.075 1,050 1,022 1,007 988 963 945 ...
... Readings were then taken at frequent intervals of the deflections of the radio-micrometer, and simultaneously the temperature of the enclosure. TABLE I. T' absolute J.3I7 1,266 1,206 1,193 1,161 1,105 1.075 1,050 1,022 1,007 988 963 945 ...
Pagina 83
... readings thus obtained are given , and in Fig . 3 the logarithms of these values are plotted . The straight line drawn on the chart represents a fourth power curve , and it will be seen that the observations lie very close to it , and ...
... readings thus obtained are given , and in Fig . 3 the logarithms of these values are plotted . The straight line drawn on the chart represents a fourth power curve , and it will be seen that the observations lie very close to it , and ...
Pagina 96
... reading , and the slit brought into the focal plane by moving the entire spec- trograph in the manner indicated above . The prism train ordinarily employed contains three 60 ° flint 96 GEORGE E. HALE AND FERDINAND ELLERMAN.
... reading , and the slit brought into the focal plane by moving the entire spec- trograph in the manner indicated above . The prism train ordinarily employed contains three 60 ° flint 96 GEORGE E. HALE AND FERDINAND ELLERMAN.
Pagina 103
... reading and wave - length ) of the standard lines are thus measured off , and the points plotted by means of a sharp steel pin held in a fixed position by a support firmly attached to the overhanging arm of the milling machine . After ...
... reading and wave - length ) of the standard lines are thus measured off , and the points plotted by means of a sharp steel pin held in a fixed position by a support firmly attached to the overhanging arm of the milling machine . After ...
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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...
Pagina 357 - PRINTERS AND BINDERS THE PRINTING OF BOOKS DEMANDING TASTE AND CAREFUL EXECUTION, PRIVATE EDITIONS, COLLEGE CATALOGUES AND ANNUALS A SPECIALTY. WE PRINT MORE FINE BOOKS THAN ALL OTHER HOUSES WEST OF NEW YORK. OUR NEW FACTORY, RUN ENTIRELY BY ELECTRICITY, IS THE MOST ADVANCED PRINTING PLANT IN THE COUNTRY. THE LAKESIDE PRESS BLDG., PLYMOUTH PLACE, COR. POLK, CHICAGO.
Pagina 384 - Sold in quart bottles only, by Druggists and high-class Grocers. Prepared only by Henry B. Platt, Platt Street, New York.