Prof. Cliford C. Crump, director of the Perkins Observatory and National Bureau of Standards Director Dr. George K. Burgess examing the Bureau's 177-centimeter (70-inch) telescope disk in 1927 after an 20 centimeter (8-inch) hole had been drilled through its center for mounting. The disk after polishing was set up in 1931 in the observatory at Ohio Wesleyan University.