a website collaboration between Science Service and the Smithsonian Institution

PHOTOELECTRIC COLOR CONTROL DEVICE

E&MP 95.014

Photo Electric Cells

1927 - cell unit, left, and amplifier unit, right, for photoelectric color control device, type w-1

May 2,1927

Covers open: - 446340 654 cell unit, left, and amplifier unit, right, for photoelectric color control device, type w-1.


Original Caption by Science Service
© GE Publicity Department



National Museum of American History

Home

Search - Site Map - Subjects to Choose From - Numbering Format

Credits - Copyright - Comments