sunlight to a grating spectrometer inside the Stonyhurst College Ob- 

 servatory. 20815 



The student observatory at Swarthmore College in Pennsylvania, 

 built in 1886, houses a 6-inch equatorial refracting telescope complete 

 with spectroscope and position micrometer, as well as a small transit 

 instrument. The 6-inch objective was made by the Clarks, its mounting 

 was by Warner & Swasey, and the accessories were made by Brashear. 209 



Lewis Swift was the proud owner of a 16-inch Clark telescope — a 

 present from his fellow citizens of Rochester, New York. When installed 

 in the observatory built by H. H. Warner in 1882, it was the third largest 

 refractor in the United States. It was equatorially mounted and, accord- 

 ing to Swift, provided with all the modern improvements. These included 

 a spectroscope and a filar micrometer with Burnham's illumination. 210 

 Aided by his son Edward, Swift searched for comets and nebulae until 

 Warner went bankrupt and observing conditions in Rochester deterio- 

 rated badly. In 1893 the Swifts and their telescope moved to Mount 

 Lowe (q.v. ). 



Swift's early observations had been made with a 4/2 -inch Fitz re- 

 fractor; when the objective broke, around 1879, it was replaced by a 

 Clark lens. 211 



The Holden Observatory at Syracuse University, dedicated in 

 1887, has an 8-inch aperture Clark equatorial refractor. 212 



Around 1882 Mr. C. W. Tallman of Batavia, New York, spent $400 

 for a 5-inch Clark refracting telescope with eyepieces magnifying from 

 25 to 500 times. 213 



Elihu Thomson, the electrical engineer of Lynn, Massachusetts, 

 bought a 9-inch aperture Petzval photographic lens from a female 

 photographer of Lynn for $70. In 1892 Alvan Clark & Sons informed 

 Thomson that the lens "was made by us about 40 years ago. The surfaces 



208b Ibid. (1888), p. 5. 



209 Swarthmore College Catalogue (1885-1886), p. 1 1. 



210 Lewis, Swift, The History and Work of the Warner Observatory, vol. 1 (1883- 1886) 

 pp. 7-10. 



211 Edward S. Holden, ed., "Reports of Astronomical Observatories," Annual 

 Report . . . Smithsonian Institution . . . 1880, p. 660. 



212 Sidereal Messenger, vol. 7 (1888), p. 41. 



213 Sidereal Messenger, vol. 2 (1883), p. 23. 



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