The Caltech Archives
Welcome imageimageimage
Archives Catalog Entry

Scientific Apparatus
Ion chamber

Smallest cylindrical electroscope. Used by Millikan and Bowen in Texas in 1922. Sent up to about 15.5 kilometers by balloon. Clock and photographic drum missing as of 5/20/70. See Physical Review 27: 353 (1926). Refurbished and painted black, 1/92. Manufacturer: Caltech Physics Shop.

ID: 1970-00012
Millikan, Robert Andrews, 1868-1953 (Experimental Physicist, Nobel Laureate, Caltech President)

Creation Jan. 1, 1920

MEDIUM: Metal; LENGTH: 7.5 inches tall; QUANTITY: 1

Topics: Physics

For information on using Archives materials for commercial or educational purposes (including reproducing PhotoNet images) please see Access and Use.

Return to Search the Archives

Search Help