Title: Spectrophotometer, quartz
Date: 1940 (approximate)
Original Format: photograph: negative
Description: Serial D-282. Phototube housing and lamp housing directly attached to main unit. Attached by cord is undistinguished light gray metal box (power supply regulator?) Mfg. National Technical Laboratories, South Pasadena, CA.
Collection: Scientific Instruments
Caltech Archives ID: ST-BE-06
