The Specific Characteristics of Vitality
Essential Differences between the Living and Non-Living State
Volume 82, Issue 2115supp
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Features
Prehistoric Irrigation Ditch Built by Indians
The Microscope Fine Adjustment
Suffocating Gases and their Antidotes
Gun Emplacements and Concealment
Considerations that Determine the Selection of Battery Positions
The Elephant Butte Dam
The Greatest Irrigation Storage Enterprise in the World
Paper Pulp from New Woods
Campaigning in the Snow
Some Things a Ski is Good For
How Long will our Oil Supply Last
Solid Solutions
Inter-Metallic Compounds, and Annealing and Properties of Metal
Color-Vision—II
And Color-Vision Theories, Including the Theory of Vision
The Life and Relining of Guns
An Electric Haulage System
Controlling Cars at a Distance from a Central Station
Aurora
Earth Currents and Magnetic Disturbances
Vitamin Solution of the Pellagra Problem
Photographic Effect of Luminous Watches
Shrapnel Shells
How they are Designed and Tested
Wave or Vortex
Drainage to Prevent Erosion
Benjamin Brooks
The Cosmological Ideas of the Greeks
Philosophy Which Aimed to Comprehend the WorId in a Natural Way