Features
Experiments Made at the Laboratory in the Catacombs; Effect of Darkness upon Animals, Etc
The Advantages and Drawbacks of Turbines for Ocean Steamers
New Process of Manufacturing Ozone
The Caves and Dene-Holes at Chiselhurst
The Current Supplement
Driving a Test Pile for the Hudson River Tunnel
A New English Aluminium Welding Machine
New Electric Chronometer for Timing Automobiles
An Interesting Paradox
The Russian Reverse at Port Arthur
The Greatest of Pipe Organs
The Submarine Mine
Concrete Railway Bridges
A Fire Escape for Tourists and Travelers
A Novel Italian Unicycle
Departments
- Departments
Science Notes - April 23, 1904
Legal Notes - April 23, 1904
Notes and Queries - April 23, 1904
Recently Patented Inventions - April 23, 1904
Business and Personal Wants
Index of Inventions - April 23, 1904
New Books, Etc - April 23, 1904
Patents - April 23, 1904
