Scientific American Magazine
Volume 81, Issue 4You are currently logged out. Please sign in to download the issue PDF.
Features
Spain Sells Cruisers
The Wage of Original Research
Floating of the Paris
Comparative Operating Cost of Horse and Electric Delivery Wagons
Animal Tool-Users, Engineers, and Mechanics
Time of Transatlantic Passage Again Reduced
Brooms as Germ Breeders
A Simple Tool for Cutting Pipes
A Simple Mold for Composition Rollers
The Eastman
Moving a 500-Ton Train-Shed Arch
Niagara Falls Power Plant
Alessandro Volta
A Catalina Walking Fish
To Inventors July 22, 1899
Departments
Correspondence - July 22,1899
Recently Patented Inventions - July 22, 1899
New Books, Etc. - July 22, 1899
Notes and Queries - July 22, 1899
Index of Inventions - July 22, 1899
Business and Personal - July 22, 1899
Patents -July 22, 1899
