Scientific American Magazine
Volume 30, Issue 18You are currently logged out. Please sign in to download the issue PDF.
Features
Improved Governor
Progress of Underground Railways in London
A Tree that Keeps a Standing Army
A New Comet
The Effective Power of Steam Engines
Compartment Ships
The Oremation Question
Another New Motor
Improved Portable Oiler
Improved Combination Scissors
An Instantaneous Life Preserving Raft
Prevention in Place of Cure
James Bogardus
Scientific and Practical Information - May 2, 1874
Strain Diagrams--What They Are and What They Tell Us
Improved Mitering Machine - May 2, 1874
Christie's Railroad Detachable Claw Bar
Safety Bell Signal for Railways
The Steam Siren or Fog Horn
The Pyrophone
The English Telegraphs
Recent American and Foreign Patents - May 2, 1874
Answers to Correspondents - May 2, 1874
Communications Received - May 2, 1874
Canadian Patents - May 2, 1874
Departments
Correspondence - May 2, 1874
Business and Personal - May 2, 1874
Index of Inventions - May 2, 1874
Patents - May 2, 1874
