Features
Delay in Granting Applications for Patents
Position of the Planets in May
An Improved Railroad Snow Plow
Straub's Plan for a Sub-River Tunnel
The Berrie Paving Block
An Improved Oven Thermometer
An Improved Bake Pan
An Improved Building Block
An Improved Roller Stove Foot
An Improved Gate Fastening
An Improved Lightning Conductor for Fences
An Improved Hydrocarbon Burner
Improvement of the River Front of New York City
Remarkable Locomotive Explosion in Norway
Experiments in Magnetism
The Twin Palms and Ancient Well of Los Angeles
Mercurial Jet Siphon
To Inventors- April 27, 1889
Departments
- Recommended
New Books and Publications- April 27, 1889
- Departments
Recently Patented Inventions- April 27, 1889
Business and Personal- April 27, 1889
Notes and Queries- April 27, 1889
Index of Inventions- April 27, 1889
