Features
A New Scholarship at Sibley College
Nitric Acid Bacteria
Position of the Planets in July
The Forty-First Annual Meeting of the American Association for the Advancement of Science
A Proposed World's Fair Tower
A Light and Durable Fence
A Novel Top
Prof. Thurston's Arc Lamp Improvement
An Improvement in Car Couplers
Photographic Notes- July 2, 1892
Manufacture of Porous Cups for Electric Batteries
A Weird Spectacle
Departments
- Letters
Correspondence- July 2, 1892
- Recommended
New Books and Publications- July 2, 1892
- Departments
Recently Patented Inventions- July 2, 1892
Business and Personal- July 2, 1892
Notes and Queries- July 2, 1892
Index of Inventions- July 2, 1892
