EnvironmentDecember 1, 1930
When Crude Oil Crosses The Seas
Stories by Henry W. Hough
EnvironmentNovember 1, 1930
A Gallon of 'Gas' from a Gallon of Oil
EnvironmentApril 1, 1930
Mining Coal With Mammoth Shovels
Open-Pit Mining Operations at Colstrip, Montana, Using New Operating Equipment of Unsurpassed Size and Efficiency
EnvironmentMarch 1, 1930
Refining Metals by Electrolysis
Production of Refined Zinc and Copper by the Electrolytic Process in the World's Largest Metal Reduction Plant
EnvironmentJanuary 1, 1930
Mass Production in Agriculture
Large-Scale Farming Operations May Be Revolutionized By Means of Tractors Powered With Diesel Engines
The SciencesOctober 1, 1929
Greater Washington Starts to Rise
EnvironmentAugust 1, 1929
Our Crop-Destroying Insect Pests
Man Struggle With the Insects Becomes Increasingly Intense as We Are Attacked by More Formidable Foes
EnvironmentJuly 1, 1929
Underground Arteries for Oil and Gas
Pipelines Hundreds of Miles in Length Surmount Natural Barriers Transporting Fuel to Refineries and Distant Cities
TechnologyMay 1, 1929
Putting it Over with "Movies"
Advertisers Adopt the Use of Motion Pictures to Promote Good Will, "Educate" Prospective Clients, and Sell "Hard-to-Advertise" Products and Service