Features
Invention the Mother of Necessity
Publishers' Notice
Underground Railways in American Cities
Street Travel
Boilers and Boiler Owners
Snake Poisons
Notes from the Vienna Exposition
Cummings' Steam Mowing, Reaping, and Thrashing Machine
Specific Gravity Indicator
Electric Gas Lighter
New Form for Metallic Telegraph Poles
En Route to the Great Exposition Number 2.--Letter from United States Commissioner Professor R. H.Thurston
The Great Leopard Moth
Improved Cultivator
A New Fire Escape
Novel Claw Hatchet
An Improved Horse Collar Brace
New Heel Plate for Boots and Shoes
Robert Wilhelm Bunsen
The New Electric Light in London
Light and Life
To Europe in a Balloon
Recent American and Foreign Patents
Value of Patents, and How to Obtain Them Practical Hints to Inventors
Answers to Correspondents
Communications Received - July 19, 1873
Schedule of Patent Fees
To Investors - July 19, 1873
Scientific American - July 19, 1873
Departments
- Departments
Correspondence - July 19, 1873
Business and Personal - July 19, 1873
Notes and Queries - July 19, 1873
Index of Inventions - July 19, 1873
