Features
A Peruvian Infernal Machine
Effect of Starvation on the Blood
Color Blindness in Connecticut
A Good Year for Statistics
Influx the Source of Invention
Artificial Citric Acid
Mechanical Inventions
Clutch for Bow Strings
Fire in a Pennsylvania Coal Mine
New Coupler
A Lens With Variable Focus
Yellow and Red Phosphorus in the Manufacture of Matches
Miscellaneous Inventions
A Substitute for the Crank
Improved Book-Rack
The Steamer Pittsburg
New Air Gun
The Glycerine Barometer
Taguan Flying Squirrel
Clothing in its Relation to Health
Engineering Inventions
Artificial Cold
Facts About Cheese
Communications Received
Departments
- Departments
New Inventions
Recent Inventions
Business and personal
Notes and Queries
New Books and Publications
Index of Inventions
