presume it is proper for me to now say, of objectives and prisms, was 

 [Lundin's] and the skill was his." 87 



Friedrich Wilhelm Rudolph Engelmann added an 8-inch Clark 

 glass, equatorially mounted by the Repsolds, to his private observatory 

 in Leipzig in 1881. 88 



Wentworth Erck installed a 7/2 -inch Clark objective in his ob- 

 servatory at Sherrington, Bray, Ireland, in 1873. 89 This lens, figured 

 twenty years previously, was the first that Clark had sold to Dawes (q.v. ) . 

 The glass was "so full of bubbles that to one versed in such matters it 

 might have appeared almost worthless for the delicate purpose for which 

 it was intended"; 90 nevertheless, its definition was so exquisite that Erck 

 was able to see Deimos, shortly after its discovery in 1877, even though 

 this outer satellite of Mars was invisible to many larger and more suit- 

 ably located instruments. 91 



Marshall Davis Ewell, a Chicago lawyer, purchased a 6%-inch 

 Clark equatorial and set up a small astronomical observatory in 1886. 92 



B. M. Fish, of Hamburgh, New York, had a 7/3 -inch Clark re- 

 fractor of 1872 with which he searched for comets. 93 



Captain Richard S. Floyd, who as first president of the Lick Trustees 

 was instrumental in the development of the Lick Observatory, had a 

 private astronomical observatory at Kono Tayee, Clear Lake, California. 

 In 1889 Captain Floyd acquired a 5-inch aperture refracting telescope 

 made by the Clarks. Like the 13-inch Boyden telescope at the Harvard 

 College Observatory (q.v.), Floyd's telescope could be used for both 

 visual and photographic work. The visual observations were made with 

 the two lens components nearly in contact, resulting in a focal length of 



87 D. W. Edgecomb, "On the Performance of a 6%-inch Binocular Telescope," 

 Popular Astronomy, vol. 10 (1902), pp. 523-531. 



88 "Telescopes," Encyclopaedia Brittanica (gth ed., Chicago, 1894), vol. 3, pp. 

 149-150. 



89 Wentworth Erck, "Description of an Observatory Erected at Sherrington, 

 Bray," Observatory, vol. 1 (1877), pp. 135-137. 



90 Monthly Notices, Royal Astronomical Society, vol. 51 (1891), pp. 194-196. 



91 Asaph Hall, Observations and Orbits of the Satellites oj Mars (Washington, D.C., 

 1878), p. 34. 



92 Sidereal Messenger, vol. 5 (1886), p. 287. 



93 William H. Knight, "Some Telescopes in the United States," op. cit., pp. 

 396-397- 



62 



