3-inch aperture transit instrument, though inactive, is still in Ann Arbor. 

 The 6-inch objective of the equatorial refractor is now used in the find- 

 ing telescope of the main instrument in the Lamont-Hussey Observatory 

 in South Africa. 



The University of Mississippi, which ordered but was unable to 

 purchase the Dearborn telescope (q.v.) , finally received a sample of the 

 Clarks' workmanship around 1868. At that time the Clarks reground the 

 5-inch objective of the university's G. Merz und Sonne equatorial refract- 

 ing telescope. 172 Twenty years later, when the University of Mississippi 

 was again in the market for a large telescope, Prof. R. B. Fulton asked 

 the Clarks for a bid. Alvan Graham wrote in reply that they had been 

 "giving much attention to medium sized telescopes calculated to do the 

 finest possible work, and one that we have recently made for Harvard 

 College, of 13 inches, is doing the most satisfactory work." The cost of 

 a similar telescope, adaptable for photographic as well as visual work, 

 and securely mounted, would be $1 0,000. 173 Despite the attractiveness 

 of the Clark's offer, the contract was finally given to Sir Howard Grubb 

 of Dublin. 



In 1880 the Unwersity of Missouri, in exchange for their 1853 

 Fitz equatorial refractor of 4 inches aperture and $500, acquired the 73/2- 

 inch Merz und Sohne equatorial refractor which had been erected at 

 Shelby College in Shelbyville, Kentucky, in 1850. At the time of transfer 

 the larger telescope was guided by a Clark finder of 1 % inches aperture. 174 



In 1858 the "Women of America," acting through Elizabeth Peabody, 

 gave Maria Mitchell, America's first woman astronomer, an equa- 

 torial refracting telescope made by the Clarks. 175 Miss Mitchell econo- 

 mized by taking a 5-inch objective, rather than one of 6 inches, so she 



172 List of Articles of Philosophical Apparatus in the Collection, 1 861 , with Later 

 Additions (manuscript copy in Department of Physics and Astronomy, University of 

 Mississippi). 



173 Alvan Graham Clark to Prof. R. B. Fulton, 18 August 1890 (letter in Mississippi 

 Collection, University of Mississippi Library). 



174 Milton UpdegrafF, "Determinations of the Latitude, Longitude and Height 

 Above Sea Level of the Laws Observatory of the University of the State of Missouri," 

 Trans., Academy of Science of St. Louis, vol. 6 (1894), p. 483. See also Edward S. 

 Holden, ed., "Reports of Astronomical Observatories," op. cit., p. 635. 



175 Helen Wright, Sweeper in the Sky (New York, 1949), pp. 126-127. 



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