Improved Planing and Matching Machine

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