Browse Items (71 total)

Metal, glass

In 1914, the Observatory was connected to a wireless apparatus to receive radio time signals. The apparatus consisted of one wire 650 feet long stretching from the Observatory to the Auditorium to Lincoln Hall. In 1964, the antenna…

Two examples of approximately 270 photographic plates and films taken with the 12-inch refractor and the plate camera. Most of the photographs date to the late 1950s and early 1960s.

Graph of the moon's brightness with phase from the first application of the selenium cell photometer.

Photograph of the 4-inch Ross-Fecker camera with the 4-inch Fauth refractor as the finderscope.

The instrument was a refractor of 4-inch aperture and 28-inch focal length (f/7) with a scale of 290”/mm. It held 8x10 inch glass plates covering 20…

Wood, glass, metal

In 2 wooden boxes, hand painted glass slides in mahogany wood, several with moving parts, total of 35 lantern slides. Similar collections on-line have them made of mahogany, with brass handles and movements, stamped and…

Both of these lantern slides were used by the first director, George W. Myers, at the conference opening Yerkes Observatory held October 18-21, 1897. Myers' work, "The system of Beta Lyrae" was published in the Astrophysical Journal in 1898 (vol. 7,…

This lantern slide is marked "Property of Joel Stebbins." One of several lantern slides so marked, they all seem to connect to his dissertation completed in 1903. This slide is found in the Observatory lantern slide collection and is marked Sp22.

Lantern slide of the Observatory's counting machine. This piece of equipment was used by the third director, Robert Baker, to analyze photographic plates of the Milky Way during his research 1938-1951. The lantern slide is part of the Observatory's…

Lantern slide of the 30-inch reflecting telescope purchased in 1914. The mirror had a focal length of 20-inches and was made by John Brashear. The mount might also be by Brashear. This lantern slide is part of the Observatory's collection and is…

Lantern slide of the 30-inch reflecting telescope after it was rebuilt between 1925-1927. The dual-channel photoelectric photometer hangs on the end of the telescope. The rebuilt telescope was located in a 15-foot domed Observatory located on…