TechnologyDecember 26, 1914
Air Transparency for Infra-Red Rays
Application of These Rays to Telephotography
Stories by G. Michaud
TechnologyOctober 10, 1914
Flowers Photographed with Invisible Light
High Reflecting Power for Ultraviolet Rays of Certain Yellow Blossoms
HealthDecember 27, 1913
Skin Defects in Invisible Light
A Method that may have a Wide Application in Medicine
The SciencesSeptember 28, 1912
How to Make an Ultra-violet Ray Objective