Features
Two Typical Experiments
Publishers' Card
The Patent Office Again
Mica Mines in North Carolina
Tyndall on Typhoid
How to Investigate Spiritualism
The Crystallization of Glass
New Cloth-Singeing Machine
Floating Fire Engines
The Normal College, New York City
Apid Estimation of Phosphoric Acid, Magnesia, and Lime
Pendulum Governors
The Ericsson Pneumatic Torpedo
Coppen's Improved Transplanter
Improved Spike Extractor
The Yuccas
The Hymenocalyx Undulata
The Constitution of the Sun
Number I
Electro-Deposition of Metals
Decisions of the Courts - December 19, 1874
Recent American and Foreign Patents - December 19, 1874
Answers to Correspondents - December 19, 1874
Communications Received - December 19, 1874
Canadian Patents - December 19, 1874
Departments
- Letters
Correspondence - December 19, 1874
- Departments
Index of Inventions - December 19, 1874
Business and Personal - December 19, 1874
