Features
Improved Shot Pouch Sling
Postal Detective Service
Temperature of Ignition of Charcoal
The Vacuum an Absolute Non-Conductor of Electricity
Don't Kiss the Baby!
Scientific Facts and Speculations
Seeing Through Colored Glasses
The Underground Railway, New York City
NUMBER VII.
Road and Farm Locomotives and Steam Road Rollers
Wool Washing Machinery
Finishing Locomotive Wheels
New Swimming Bath in London
Glue
Decisions of the Courts
United States Circuit Court.--District of Massachusetts.
Astronomical Notes
Recent American and Foreign Patents - January 2, 1875
Repeal of Patents--Opinion of the Attorney General
Answers to Correspondents - January 2, 1875
Communications Received - January 2, 1875
Canadian Patents - January 2, 1875
Departments
- Recommended
New Books and Publications - January 2, 1875
- Departments
Business and Personal - January 2, 1875
Index of Inventions - January 2, 1875