BPRA Photoelectric Densitometer
- Made:
- circa 1930
This image is released under a CC BY-NC-SA 4.0
Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
License
Science Museum Group
©The Board of Trustees of the Science Museum
B.P.R.A. photoelectric densitometer c.1930.
