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Start Over You searched for: Genre Scientific apparatus and instruments Remove constraint Genre: Scientific apparatus and instruments Subject Photovolt Corporation Remove constraint Subject: Photovolt Corporation Date 1948 Remove constraint Date: <span class='single'>1948</span>
1 entry found
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Lumetron Photoelectric Colorimeter Model 400-A
- 1940s
Electric-powered meter with instructions housed in wooden box. Movable components within box: two (2) slide glass filters (1 with red, green, and blue slides; 1 with orange, green, and blue slides); one (1) encasing to…
- Manufacturer Photovolt Corporation
- Subject Colorimetry--Instruments, Photovolt Corporation