Features
Capturing Frost Flowers
Sending Photographs Over a Telephone Wire
The Improved Bélin Apparatus
The Pier Problem at the Port of New York
How Manhattan Has Encroached on the Hudson River
Solution of the Steel Rail Problem
A Method of Producing Sound Ingots
The Submarine Sledge, Panama Pacific Exposition and more
By the Berlin Correspondent of the Scientific American
Steady Rests for Small Lathes
Holding Circular Saws While Sharpening
Why a Plane "Iron" has a "Cap"
Some Workshop Suggestions
Twelve Thousand Postage Stamps Per Minute, A Network Protector
Simplified High-potential Apparatus, The Maxim Motorboat Silencer and more
By Our Berlin Correspondent
Departments
- Letters
Correspondance - December 21, 19
- Recommended
New Books, Etc. - December 21, 1921
- Departments
Inventions New and Interesting - December 21, 1912
Recently Patented Inventions - December 21, 1921
Notes and Queries - December 21, 1921
