Black and white photograph of 36-inch reflecting telescope (Cassegrain type). Built in 1957 for public viewing and limited research, optics by Perkin-Elmer Corp., and Doctor Jason J. Nassau at the controls., "T-1622"
Black and white photograph of Burrell Memorial Observatory. Gift of his wife, Katherine Ward Burrell. Dome is 26 foot in diameter, sales order no. 498741, built by Paterson-Leitch Co., Cleveland, Ohio, 13-inch equatorial telescope (13 3/8" actual aperture and 162" focal length-> objective lens)., "T-1590"
Black and white photograph of the 40 inch Yerkes Equatorial Telescope. The telescope was the largest of its kind in the world. It was designed, built and erected by Warner & Swasey, along with a 90 foot dome and 75 foot elevating floor. Telescope column and head rise to a height of 43 feet and weighs 50 tons. The tube is 64 feet long and 52 inches in diameter at the center. The total weight of the instrument is 75 tons. The 40-inch objective lens was made by Alvan Clark. The dedication of the observatory was not until October 1897. Its first director was Dr. George E. Hale., "Photo no. 569"
Black and white photograph of the 2-inch Alt-Azimuth instrument taken in the Warner & Swasey instrument room for Mr. Ambrose Swasey, October 1928. The instrument was designed and built by the Warner & Swasey Co., "Photo no. 6498"
Black and white photograph with caption for two images of a 12-inch equatorial position micrometer (M-48) front and side views. Micrometer built for Philadelphia High School. The caption reads, "The micrometer is an instrument attached to the eye end of a telescope and is intended for measuring the diameter of sun, moon, and planets, the size of sun spots and markings on the planets; the distance of the satellites from their primaries- between two contiguous stars- between a star and planet or between a comet and a contiguous star in order to determine its motion, etc.", "No. 28-A"
"No. 29-A"
Black and white image from the front cover of the pamphlet for the Warner & Swasey Co. exhibition at the Panama-Pacific International Exposition in 1915., Number on bottom of pamphlet, front page "945-1915".