Scientific American Magazine
Volume 65, Issue 21You are currently logged out. Please sign in to download the issue PDF.
Features
The Sponge Fisheries of the Bahamas
Economy of Flight
A Wagon Maker's Spoke Puller
A Continuous Driving Ratchet Drill
A Portable Hot Water or Steam Heater
An Electric Lamp Cover and Switch
A Design for Easels and Other Stands
An Improved Typewriting Machine
An Improved Churn
The World's Fair Lumber and Forestry Building
Largest Dry Dock on the Great Lakes
A Steam Engine Slide Valve
Some Suggestions in Photography
Departments
Correspondence- November 21, 1891
Recently Patented Inventions- November 21, 1891
Notes and Queries- November 21, 1891
Business and Personal- November 21, 1891
New Books and Publications- November 21, 1891
To Inventors- November 21, 1891
Index of Inventions- November 21, 1891
Patents- November 21, 1891
