Page:Astronomy for Everybody.djvu/90

mountings of the great instruments were made by other parties. That of the Pulkova telescope was made by the Repsolds of Hamburg, the most noted makers of fine astronomical instruments in Europe. The Lick and Chicago telescopes were mounted by Warner & Swazey, of Cleveland, Ohio, who are gaining the highest reputation in this class of work. In the case of the Chicago telescope, arrangements were devised by them which surpass all ever before thought of. The observer has only to touch electric buttons to have all the work of pointing and moving the telescope performed by electricity.