Used from about 1930 on. See Phys. Rev. 27:235 (1931). In good working condition as of 1/70. Victor Neher described it as a “high pressure ionization chamber” with 30 atmospheric pressure. It was, he said, used more than other instruments by RAM and was sunk in Muir Lake. This instrument is the most valuable of its type. Mfg. CIT Physics Shop.
ID number
ST-CR-06
Title
Rheostats (3)
Abstract
On 13” inscribed: “Central Scientific Company 22.5 Ohm 4.4 Amps”.
ID number
ST-CH-16.1-3
Title
Gates Lab
Abstract
Buildings: Gates Chemical Laboratory.
ID number
30.7-10
Title
Gates Lab
Abstract
Buildings: Gates Chemical Laboratory.
ID number
30.7-15
Title
Gates Lab
Abstract
Buildings: Gates Chemical Laboratory.
ID number
30.7-16
Title
Potentiometer, white double
Abstract
Serial no. 209395. The instrument is described in Leeds and Northrup Bulletin no. 726 (1927). Purchased by CIT in 1950. Mfg: Leeds and Northrup Co., Philadelphia, PA.
ID number
ST-PH-20
Title
Robert A. Millikan, Julius Pearson and Ira Bowen
Abstract
Pearson was head instrument maker and came from U. of Chicago. RAM said of him: "He won three Nobel Prizes--Michelson's, Anderson's and mine."
ID number
1.36-1
Title
Aachen Institute
Abstract
Theodore von Karman is in the center of the front row. von Karman Papers.
ID number
TVK163.6-1
Title
Two men with metal plane is shed
Abstract
Photo was taken in Aachen. von Karman Papers.
ID number
TVK163.6-11
Title
Theodore von Karman with a group in Aachen
Abstract
Theodore von Karman is third from the right. Photo by J. Preim Sohn, Aachen. von Karman Papers.
ID number
TVK163.6-15
Title
Ion chamber, early (C)
Abstract
Large cylindrical electroscope used by Millikan in early cosmic ray research. Mfg. CIT Physics Shop.
ID number
ST-CR-12
Title
Enrico Volterra with friends
Abstract
Enrico Volterra (far right) in Italy on a recreational car trip with some friends.
