Features
Behr on His High-Speed Monorail System
Submarines for the British Navy
Death of Prof. Henry A. Rowland
Death of Richard P. Rothwell
The National Academy of Sciences
The Ordnance Board's Test of Thorite
Parsons 1,000-K. W. Turbine and Alternator
How to Make a Gramophone
A New Weather Cannon
Raising A Submerged Steamship
Army Transport Service in the Philippines--II
An Automatic Boiler-Feeder
An Improved Plow
A Wheat Hospital on Lake Superior
Some New Features in Ant Life
The Cooper Hewitt Lamp
Business and Personal Wants
Departments
- Departments
Recently Patented Inventions - April 27, 1901
Index of Inventions - April 27, 1901
New Books, Etc. - April 27, 1901
Notes and Queries - April 27, 1901
Patents - April 27, 1901