Volume 121, Issue 13
You are currently logged out. Please sign in to download the issue PDF.
Features
Chaining the Missouri
How the Tubular Concrete Pile Has Been Used to Check the River's Inroads on Its Banks
The Desert Sign Post
Opening Up America's Waste Lands by Aid of the Painted Word Photos by United States Geological Survey
The Stop-Watch in Industry
Some Reasons for Believing That It Is Out of Place There
Research in Refractories
Some of the Mistakes Which Are Avoided by Full Use of What Science Can Tell
The Lesson of the Caldwell Range
Governmental Encouragement of Rifle Practice in Time of Peace Vital for National Security
Our Technical Achievements in the Great War--Concluding Chapter
The Share of the Various Armies in Bringing About the Final Victory
Asbestos Mines of Quebec
How Nature Put the Mineral Fiber in the Rock, and How Man Gets It Out