Features
Friction of Water in Pipes
Publishers' Notice
To Europe by Balloon
The Greatest Gas Well in the World
A New Substitute for Rubber
Scientific and Practical Information
The Zodiacal Light
The Gardner Governor
Improved Washing Machine
The Tunnicliffe Fire Alarm
The Isabella Tiger Moth
From the Fourth Annual Report of Charles V. Elley, State Entomologist of Missouri.]
New Turkish Bath
En Route to the Great Exposition--Letter from United States Commissioner Professor R. H.Thurston
On Girders and Floor Beams.--The Effect of Cross-Bridging
Automatic Car Coupler
Patent Ventilating and Heating Stove
Great Balloons
Recent American and Foreign Patents
Value of Patents and How to Obtain Them Practical Hints to Inventors
Answers to Correspondence - July 26, 1873
Communications Received
Schedule of Patent Fees
Departments
- Departments
Correspondence - July 26, 1873
Business and Personal - July 26, 1873
Notes and Queries - July 26, 1873
Index of Inventions
