Features
The Disposal of Sewage
What is Energy?
The Butterfly
What Inventors Say
Adulteration of Paints
Editorial Summary- July 9, 1870
Sirups for Soda Water
Gas as Fuel
The Progress of Chemistry in 1870
Steam Road Rolling
Progress of Invention Abroad
Hydrophobia and Dog Muzzling
Scientific Intelligence- July 9, 1870
The Stevens Institute of Technology
The New York Dock Commission--The Principal Plans Submitted
City Railroad Cars
Answers to Correspondents- July 9, 1870
Recent American and Foreign Patents- July 9, 1870
Official List of Patents- July 9, 1870
Applications for the Extension of Patents- July 9, 1870
Departments
- Letters
Correspondence- July 9, 1870
- Recommended
New Books and Publications- July 9, 1870
- Departments
Business and Personal- July 9, 1870
