1 September 1938, Volume 28, Issue 9, pp. 323-353  
6 articles

An Apparatus for Testing Highway Sign Reflector Units

J. Opt. Soc. Am. 28(9), 323-326 (1938)  View: HTML | PDF

The Path of a Ray of Light Tangent to the Surface of the Earth

J. Opt. Soc. Am. 28(9), 327-329 (1938)  View: HTML | PDF

Correlation of Optical Properties and Photoelectric Emission in Thin Films of Alkali Metals

J. Opt. Soc. Am. 28(9), 330-338 (1938)  View: HTML | PDF

Surrounding Gaseous Medium and the Herschel Effect

J. Opt. Soc. Am. 28(9), 348-348 (1938)  View: HTML | PDF

A Physical Density Comparator

J. Opt. Soc. Am. 28(9), 349-353 (1938)  View: HTML | PDF