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 44
... rays out of the center of the sphere . This also has the advantage of allowing , even with high disper- sions , the use of a sensitive surface bolometer , which of course must be opaque for its whole breadth . The visual observation of ...
... rays out of the center of the sphere . This also has the advantage of allowing , even with high disper- sions , the use of a sensitive surface bolometer , which of course must be opaque for its whole breadth . The visual observation of ...
Pagina 60
... , the images not being as sharp as could be desired from one reflection , and the transmission of the rays through so many media ; the loss of half the light by polarization ; the limitation of its use to the vicinity of the 60 REVIEWS.
... , the images not being as sharp as could be desired from one reflection , and the transmission of the rays through so many media ; the loss of half the light by polarization ; the limitation of its use to the vicinity of the 60 REVIEWS.
Pagina 95
... rays from the 40 - inch objective at a distance of 30 cm from the slit . When the lens is in place ( it is carried by an adapter accu- rately centered in the tailpiece of the telescope ) the divergence of the cone of rays after passing ...
... rays from the 40 - inch objective at a distance of 30 cm from the slit . When the lens is in place ( it is carried by an adapter accu- rately centered in the tailpiece of the telescope ) the divergence of the cone of rays after passing ...
Pagina 97
... rays has been employed in the collimator . Many of the earlier photographs of the fainter stars were made with the dispersion of a single heavy flint prism and the long ( 508 mm ) camera . It was subsequently found , however , that much ...
... rays has been employed in the collimator . Many of the earlier photographs of the fainter stars were made with the dispersion of a single heavy flint prism and the long ( 508 mm ) camera . It was subsequently found , however , that much ...
Pagina 98
... rays from the objective . After passing through the prism the rays are ren- dered parallel by a lens , and are brought to the observer's eye after two more reflections . The eyepiece is placed at a con- venient point just above the ...
... rays from the objective . After passing through the prism the rays are ren- dered parallel by a lens , and are brought to the observer's eye after two more reflections . The eyepiece is placed at a con- venient point just above the ...
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Termeni și expresii frecvente
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.