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Features

Notes of Patent Decisions of the Courts

A Common Ailment.--Malarial Poisoning

Amending (?) the Patent Laws

Curiosities of Suicide

How to True Up a Crank Pin

More News From the Sun

The Proposed Amendments to the Patent Laws

Horizontal Compound Engine

Improved Pneumatic Dredging Tube

Improved Protected Non-Recoil Gun

Communications

The Curious Life-History of Our Blister Beetles

By C. V. Riley

Combination Lathe, Scroll Saw, Etc

The Corrugated Iron Air Bridge and Fuel Economizer

The Duck-Billed Platypus

Proposed Balloon Voyage to the North Pole

Machines that Hear and Write

John William Draper

Automatic Shaft Oiler

Communications Received

Wants and Business Inquiries

Departments

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    Business and Personal

  • Notes and Queries

  • Index of Inventions

  • Patents

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December 15, 1877

Beyond XX and XY

Biology. Identity. Equality.