Scientific American Magazine
Volume 68, Issue 7You are currently logged out. Please sign in to download the issue PDF.
Features
The Harbor Defense Ram Katahdin
The Annual Report of the Commissioner of Patents
The Crowning Achievements of the Telephone
Progress of Long Distance Telephony
The Equitable Printing Telegraph
An Improved Railway Coach
An Improved Fire Escape
An Improved Drilling Machine
A Safety Valve for Water Gauges
Atmospheric Pressure
Notes on the Sugar Industry in Cuba
The Fontainebleau Proving Grounds
Departments
Correspondence- February 18, 1893
Recently Patented Inventions- February 18, 1893
Notes and Queries- February 18, 1893
Business and Personal- February 18, 1893
New Books and Publications- February 18, 1893
Index of Inventions- February 18, 1893
To Inventors- February 18, 1893
Patents- February 18, 1893
