Figure 26. — The 26-inch aperture equatorial refracting telescope 

 made by Alvan Clark & Sons for the U.S. Naval Observatory in 

 Washington, D.C. 



The mounting of the 26-inch telescope lacked stability and so in 1893, 

 when the observatory moved to its present location in Georgetown 

 Heights, the great equatorial was remounted by Warner & Swasey. The 

 discarded mounting and driving clock were salvaged and formed the 



103 



