Features
Humanity Versus Fanaticism
Corn as Fuel
Intolerance among Physicians
Extinguishing Petroleum with Chloroform
How to Get Rid of Foundlings
Plea for a Government Perpetual Motion
Miscellaneous Inventions - May 21, 1881
Novel Oil Separator
Novel Car Cooler
The Gamgee Perpetual Motion
Engineering Inventions - May 21, 1881
Novel Washing Machine
A Simple Filter Pump
New Telephone Transmitter
Novel Candlestick
The Lemur Vari
Communications Received - May 21, 1881
Departments
- Departments
New Books and Publications - May 21, 1881
Business and Personal - May 21, 1881
Notes and Queries - May 21, 1881
Index of Inventions - May 21, 1881