Figure 2: Galvanometer and accessories for the selenium photometer. Page 191.
Visible in the photograph are the galvanometer, reading telescope, scale, batteries,Wheatstone bridge, and resistance boxes. Was located in the west-central transit…
Post text: "Radio telescope at the Vermilion River Observatory, University of Illinois. Giant radio telescope 600 feet long, 400 feet wide. A wire mesh on the surface reflects cosmic signals to 274 antennas on the wooden truss, 153 feet high. It is…
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,…
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…
One of over 1000 lantern slides in the Observatory's collection. Labelled "E1" this is a photograph of the photoelectric photometer Dr. Joel Stebbins and Dr. Jakob Kunz used to observe the solar eclipse on June 8, 1918. The photograph also appeared…
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…