A New Type of Powerful Mortar
The Krupp Eleven-inch Howitzer and Portable Carriage By the English Correspondent of the Scientific American
The Largest Ship Yet Constructed
The Launch of the 65,000 Ton Liner "Imperator"
A New Use for Potatoes
Raising Potatoes in Germany for Industrial Purposes
The Failures of the "Aviettes"
Impossible Performances for an Impossible Prize
Preserving and Mounting Plant Specimens
How Pressure and Heat Can be Effectively Used
Some Suggestions for Home Experiment
Some Experiments with Blue Glass
V.--Shall My Boy Become a Chemical Engineer?
The Annual Convention of the Master Car Builders Association
Superheated Steam in Locomotive Service, The Current Supplement
Correspondence - July 6, 1912
New Books, Etc. - July 6, 1912
Inventions New and Interesting - July 6, 1912
Recently Patented Inventions - July 6, 1912
Notes and Queries - July 6, 1912