Features
Report of the Commissioner of Patents
Chesley's Globe Valve
Proteus--The New Optical Deception
Garrett's Hay Fork
Polytechnic Association of the American Institute
Plimpton's Parlor and Ice Skates
A Point Overlooked
The Passage of Heat through Water
Farmers' Club
Town Sewage as Manure
Patent Claims
Issued from the U. S. Patent Offic
Mechanics
Inventors, Manufacturers
Davis's Bolt Header
Departments
- Departments
Correspondence
Notes and Queries
New Inventions