The Observatory, Volume 50

Front Cover
Editors of the Observatory, 1927 - Astronomy
Some vols. for 1886- include a special issue: Annual companion to the Observatory.
 

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Page 272 - our astronomical observer" at a salary of 100 per annum, his duty being "forthwith to apply himself with the most exact care and diligence to the rectifying the tables of the motions of the heavens and the places of the fixed stars, so as to find out the so much desired longitude of places for the perfecting the art of navigation.
Page 275 - That the Conference proposes to the Governments here represented the adoption of the meridian passing through the centre of the transit instrument at the Observatory of Greenwich, as the initial meridian for longitude.
Page 97 - THE Bruce Gold Medal of the Astronomical Society of the Pacific for 1927 has been awarded to Prof.
Page 99 - Report of the Superintendent of the US naval observatory for the year ending June 30.
Page 386 - ... one on San Antonio Peak, California, to be used as a base line in the determination of the velocity of light, Professor Michelson made a request on May 1, 1920, upon the Director of the United States Coast and Geodetic Survey, Colonel E. Lester Jones, that the work be done. The Director, realizing that the determination of the velocity of light with great accuracy might lead to the determination of distance in terms of the velocity of light and thus might furnish a means of measuring base lines...
Page 149 - Newton himself tried to apply this programme in optics, on the hypothesis that light consisted of inert corpuscles. The optics of the undulatory theory also made use of Newton's law of motion, the law being applied to continuously diffused masses. The kinetic theory...
Page 16 - Further Researches into the European Upper Air Data, with Special Reference to the Life History of Cyclones...
Page 198 - ... have been measured, together with the bolometric intensities of the lines in the ozone bands as compared with the background. Dr. Michelson has completed two series of measurements of the velocity of light on the 22-mile base-line between Mount Wilson and San Antonio Peak, each series consisting of 15 sets of observations. Two revolving mirrors have been used, one of 12 and the other of 16 sides, with speeds of 352 and 264 revolutions a second. The results found are remarkably accordant, the...
Page 273 - Firstly, that the unification of longitudes and hours is equally desirable in the interests of science as in those of navigation, commerce, and international communication. The scientific and practical utility of this reform considerably outweighs the sacrifices and the trouble of arrangement to which it will put the minority of civilized nations. It should, therefore, be recommended to the governments of all the states...
Page 198 - Russell finds a principal ionization potential of 6-80 volts for the neutral atom, and 13-6 voits for the ionized atom. This is the first time that the ionization potential has been determined for a complex spark spectrum. In connection with his measurement of ultra-violet solar radiation Pettit has made a laboratory investigation of the absorption properties of ozone and water vapour. The constants of absorption of ozone in the region X...

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