1 March 1920, Volume 4, Issue 2, pp. 35-82  
5 articles

The Response of the Average Pupil to Various Intensities of Light

J. Opt. Soc. Am. 4(2), 35-43 (1920)  View: HTML | PDF

A New Soft Focus Screen for Portrait Photography

J. Opt. Soc. Am. 4(2), 44-48 (1920)  View: HTML | PDF

The Ionization and Resonance Potentials of Nitrogen, Oxygen and Hydrogen

J. Opt. Soc. Am. 4(2), 49-54 (1920)  View: HTML | PDF

1919 Report of Standards Committee on Visual Sensitometry

J. Opt. Soc. Am. 4(2), 55-79 (1920)  View: PDF

Fourth Annual Meeting of the Optical Society of America

J. Opt. Soc. Am. 4(2), 80-82 (1920)  View: PDF