Edgar Lucien Larkin, in 1880, equipped his private observatory in 

 New Windsor, Illinois, with a 6-inch Clark equatorial refractor. In 1888 

 Larkin transferred his instruments to Knox College (q.v. ), and he be- 

 came director of that school's observatory. When Larkin moved to Mount 

 Lowe (q.v.), his instruments remained at Knox. 138 



The Underwood Observatory at Lawrence University in Appleton, 

 Wisconsin, was ready for use in 1892. The 10-inch equatorial refractor 

 and the 4-inch meridian transit had Clark objectives; the mounts were 

 by Sedgewick, undoubtedly the man responsible for the equatorial at 

 Grinnell College (q.v.). 139 



Among the many, and now probably misplaced, bread and butter 

 Clark instruments was a 4-inch equatorial — without driving clock and 

 micrometer — sold to Mr. U. W. Lawton of Jackson, Michigan, in 

 1 89 1. 140 



Shortly after its founding, Lehigh University at South Bethlehem, 

 Pennsylvania, acquired a 6-inch Clark equatorial refractor, equipped 

 with driving clock and filar micrometer. Although intended primarily 

 for teaching, this instrument was also used for astronomical discovery. 

 Through it, in 1870, Alfred M. Mayer saw a "ruddy, elliptical line" on 

 Jupiter. The only other contemporary observation of the great red spot 

 was made by Gledhill with a Cooke refractor of 9/3 inches aperture. 141 

 The Lehigh objective was remounted during the past quarter century, 

 and the original mount has been lost. 142 



The astronomical observatory of Leiden, in the Netherlands, installed 

 a new telescope in 1 885 : the equatorial mount was built by the Repsolds, 

 and the 10/2 -inch aperture objective lens was figured by Alvan Clark & 

 Sons. 143 



John M. Lewis, of Mount Vernon, Ohio, advertised a used portable 



Private correspondence with Mrs. Philip Haring, Curator, Knox College. 



Sidereal Messenger, vol. 9 (1890), p. 421. 



Sidereal Messenger, vol. 10 (1891), p. 522. 



Alfred M. Mayer, "Observations on the Planet Jupiter," Journal, Franklin 

 Institute, vol. 59 (1870), pp. 136-139; see also vol. 60 (1870), p. 82. 



42 Private correspondence with Ralph N. Van Arnam, Department of Mathe- 

 matics and Astronomy, Lehigh University. 



"Report of the Director of the Leiden Observatory for the Year Ending 

 15 Sept. 1885," reported in Observatory, vol. 9 (1886), p. 138. 



74 



