Features
The Pennsylvania Tunnel Excavation Beneath Manhattan Completed
Great Increase in Transatlantic Travel
Panama Canal to Cost $300,000,000?
Pure Hydrogen from Carbides
International Investigation of the Upper Air
The Pacific Scientific Institution of Honolulu
The Patent Office in 1907
The Current Supplement
A Unique Aerial Tramway Used in the Construction of Chicago's Lake Tunnel
A Photographic Method of Producing Bas-Reliefs
The Reuterdahl Attack on Our Navy
Insects That Are Eaten
An Improved Portable Concrete Mixer
Device for Pulling Spokes
An Apparatus for Electrically Transmitting Sight
An Improved Bale Tie
Departments
- Departments
Correspondence - January 25, 1908
Recently Patented Inventions - January 25, 1908
New Books, Etc.
Notes and Queries - January 25, 1908
Index of Inventions - January 25, 1908
Patents - January 25, 1908
