Some Present-Day Techno-Chemical Problems
Illustration of the Opportunities for Applying Scientific Knowledge to Industries
Features
Sentencing the Hawks
Red Squirrels
Air Temperature in the Tropics
Plants and Asphyxiating Gases
Trenching by Machinery
Power Devices that Facilitate the Work of the Contractor
A Gas Pressure Reducer
Cork Fabric for Featherweight Raincoats
Physiological and Pharmacological Studies on Coal Tar Colors
Tone Reproduction in Photography and its Limitations
Antagonistic Action of Salts in Plants
Tenacity to Life in Insects
A Cadmium Vapor Lamp
Seaweeds
Some of Their Economic Uses and Possibilities
Chemical Properties of Molybdenum
The Mahogany Tree
Most Valuable Member of Tropical American Forests
Ancient Rock Carvings in Sweden
The American Egypt
Correspondence
Some Experiments and Notes on Photographic Reducers
Reply to Mr. Norman J. Symons' Article in Scientific American Supplement, Dec. 9th, 1916
Cipher Codes
Photo-Micrography for the Amateur
A New Method that is Simple and Inexpensive
Decrease in Number of Live Stock in France
Luminescence Measurements
Electrical Treatment of the Wounded
Recent Methods Developed During the War
The Insulating Properties of Asbestos
Weight of Steel in New War Vessels
Use of Molybdenum in Chemicals
Use of Molybdenum in Stellite
A Correction
Methods for Preserving Bread
For French Prisoners in Germany
