Scientific American Magazine
Volume 113, Issue 4You are currently logged out. Please sign in to download the issue PDF.
Features
The Bureau of Invention and Development, Governmental Indifference to Invention and more
The Heart of the Locomotive
The Reason for the “Grasshopper” Valve Motions seen on Modern Locomotives
C. H. Claudy
Strategic Moves of the War--July 14th, 1915
Which is the Most Powerful Battleship?
How the Big Gun Plus High Speed Make for Efficiency
J. Bernard Walker
What Amount of Water Should be Used in Concrete Mixtures, Digging Battlefield Trenches by Machine and more
Certified Watches, Pranks of a Cyclone and more
The Thermaphone, Resurrecting a Dead Battery
Departments
Correspondence - July 24, 1915
Inventions New and Interesting - July 24, 1915
Recently Patented Inventions - July 24, 1915
