Food Selection—I
For Rational and Economical Living
Volume 81, Issue 2100supp
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Features
Removing Rust from Nickel
Long-Heads, Square-Heads, and Short-Heads
High-Explosive Shells
Ammunition Used in Modern Rapid Fire Guns
Turbine Blading
Photo-Chemistry
Research in Relation to the Reactions Caused by Light
Moving a Lighthouse
Some Noted Zoological Parks
The National Zoological Park at Washington
Light and Illumination—II
A Survey of the History, Principles and Practice of Lighting Concluded from Scientific American Supplement No. 2099, Page 194, March 25, 1916
Jupiter—the Solar King
Finding your Way at Night without a Compass
An Accomplishment Necessary for the Soldier, Explorer or Traveler
Jupiter—The Solar King
Flame Standards in Photometery
Conditions to Be Met and Facts Relating to Lamps Used