ASTRONOMICAL OBSERVATORIES 



from the Smithsonian Institution. For information 

 about local conditions, and means of ascending the 

 mountain, application should be made to Mr. G. F. 

 Marsh, Lone Pine, Inyo County, California. This 

 shelter was utilized in August-September, 1909, by 

 an expedition from the Lick Observatory which 

 made spectrographic observations to determine the 

 extent of the atmosphere of Mars and of its water- 

 vapor. Expeditions from the Astrophysical Ob- 

 servatory of the Smithsonian Institution carried out 

 measures of the sun's radiation at this station in the 

 summers of 1909, 1910 and 1913. 



The chief function of the Students' Observatory, 

 founded in 1885, on the campus of the University 

 of California, Berkeley, as its name implies, is in- 

 struction. In addition 19 this, extensive researches 

 have been carried out in the theory of orbit de- 

 terminations, qualified students have been encour- 

 aged to participate in these investigations and their 

 Eractical applications, and the result has been the 

 uilding up of a great school of astronomy. The 

 instrumental equipment includes five equatorial tele- 

 scopes with apertures ranging from 8 to 5 inches, 

 transit instruments, clocks, chronometers and aux- 

 iliary apparatus. 



The International Latitude Observatory at Ukiah, 

 Mendocino County, California, is one of four sta- 

 tions, widely distributed in longitude, but on the 

 same parallel of latitude (39 08' north) which were 

 established in 1898 by the International Geodetic 

 Association to make systematic observations of the 

 same series of selected stars as a basis for the study 

 of the problem of latitude variation. The equip- 

 ment consists of a zenith-telescope of 4 *4 -inches 

 aperture. This station has been in continuous ex- 

 istence to the present time, but its future is un- 

 certain because of conditions arising from the 

 European war. 



The Chabot Observatory, located in Lafayette 

 Park, Oakland, is under the control of the Oakland 

 School Department and has been used liberally for 

 the instruction of students and the public. The 

 principal telescope is an 8-inch refractor. To in- 

 crease the observatory's efficiency, the Board of 

 Education has authorized the purchase of a 20-inch 

 refracting telescope, which is now in process of 

 construction. It is to be mounted on a site selected 

 in the eastern suburbs of the city, and will be used 

 for research work as well as for instruction. 



Another observatory whose principal function is 

 instruction is the Frank P. Brackett Observatory of 

 Pomona College, Claremont, California, which was 



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