Skip to main content

Features

Improved Cut-Off in Engines

Truman's Patent Cotton Bale Tie

Manufacturing, Mining, and Railroad Items

Recent American and Foreign Patents

Editorial Summary

Answers to Correspondents

New Publications

Extension Notices

Southgate's Improved Key

Fair of the America Institute

One Cause of Boiler Explosion

Plaster of Paris–Gypsum

Rising of Water by Creating a Vacuum

Isherwood's Cog-Wheel Propeller Engine--An Interesting Comparison

Official Report of Patents and Claims

Issued by the United States Patent Office

Pending Applications for Reissues

Departments

  • Departments

    Correspondence

  • Business and Personal

Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format
October 26, 1867

Beyond XX and XY

Biology. Identity. Equality.