photometers 
| Title |
Date |
Author |
|---|---|---|
| Two Photovoltaic Cell Photometers for Measurement of Light Distribution | Jun 01, 1935 | C. L. Dows, G. R. Baumgartner |
| A Distribution Photometer of New Design | Mar 01, 1923 | C. C. Colby, Jr., C. M. Doolittle |
| Some Spectral Luminosity Curves Obtained by Flicer and Equality of Brightness Photometers | Nov 01, 1910 | Herbert E. Ives |