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 16
... less than 180 ° , which will henceforth be supposed to be the case . x It will now be shown that ( 2 ) can be expressed in terms of P1 and P , as unknowns . r ,,,, and s depend upon x1 , 1 , 1 , 2 , P2 12 , 2 , which are equal ...
... less than 180 ° , which will henceforth be supposed to be the case . x It will now be shown that ( 2 ) can be expressed in terms of P1 and P , as unknowns . r ,,,, and s depend upon x1 , 1 , 1 , 2 , P2 12 , 2 , which are equal ...
Pagina 23
... less than the Purkinje phenomenon , " wrote that " Although the lines in question differ but slightly in wave - length , their brightness is so close to the limit of visibility that great differences in relative intensity . . may be ...
... less than the Purkinje phenomenon , " wrote that " Although the lines in question differ but slightly in wave - length , their brightness is so close to the limit of visibility that great differences in relative intensity . . may be ...
Pagina 23
... less than the Purkinje phenomenon , " wrote that " Although the lines in question differ but slightly in wave - length , their brightness is so close to the limit of visibility that great differences in relative intensity . . may be ...
... less than the Purkinje phenomenon , " wrote that " Although the lines in question differ but slightly in wave - length , their brightness is so close to the limit of visibility that great differences in relative intensity . . may be ...
Pagina 34
... less intensity than the same regions in Hy . The extent of Hy is about the same as that of HB . Of the greatest interest are the comparisons between the Hẞ line and the chief nebular line , there being marked differences of intensity in ...
... less intensity than the same regions in Hy . The extent of Hy is about the same as that of HB . Of the greatest interest are the comparisons between the Hẞ line and the chief nebular line , there being marked differences of intensity in ...
Pagina 38
... less than the surface of the objective of a 4 - inch telescope . Taking into account the exposure required as well as the excel- lent definition obtained and the accuracy of the measurements , we see the value of this form of ...
... less than the surface of the objective of a 4 - inch telescope . Taking into account the exposure required as well as the excel- lent definition obtained and the accuracy of the measurements , we see the value of this form of ...
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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.