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Features

National Academy of Design, New Chemical Toy

South-West Alleghanies

Gleanings from the Polytechnic Association

Editorial Summary

Hamaker's Patent Step for Upright Shafts

Davis' Improvement in Organs

The Suspenders Bridge

The Cotton Manufacture--Mule Spinning

Dangers of Kerosene Lamps, and Means of Safety

Science Familiarly Illustrated

Spontaneous Combustion of “Coffee”

By Charles A Seely

Recent American and Foreign Patents

Answers to Correspondents

Mending Iron Castings

American Chilled Wheels in England

Pseudo-Scientific Speculation

Aerolites

The Needle Gun and the Rebellion

An Important Patent Law Question

Our Water Streets--Ferrying, Bridging and Subtubing

Patents Claims

Issued from the U. S. Patent Office

The Brotherhood of Locomotive Engineers

The Markets

Extension Notices

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February 16, 1867

Beyond XX and XY

Biology. Identity. Equality.