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Features

Improved Hoisting Machinery, A Large American Diamond

The President's Message

Ordnance Department--Guns and Iron-Clads

Increase and Condition of the Navy--The Report of the Secretary

The “Great Eastern”

Warming and Ventilation of Buildings

Domestic Economy

Our Ship-Yards

New Method of Drawing Tapes Bolts

The Pitch of Machine Screws

Compressed Air Power

The “Passaic” on Trial

Progress of the Mechanic Arts

Valuable Receipts

The Innovations of the Age

Foreign Scientific Items

Seventeen Thousand Patents Secured Through Our Agency

Sir David Brewster on the Patent Laws

Miscellaneous Summary

Patent Claims

Issued From The United States Patent Office

Recent American Inventions

To Our Readers

Hamilton and Ashton's Ice-Cream Freezer

Elberg's Chimney Cap

Departments

  • Departments

    Correspondence

  • Notes and Queries

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