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New Acoustic Apparatus

By Geo. M. Hopkins

Dangers of Lead Poisoning from the Use of Tinned Ware

Labor and the Cost of Living

Gary's Alleged Neutral Line

Heinrich Geissler

A Contrast between American and English Artisans

The Security of the East River Bridge

The Neutral Line.--A Note from Mr. Gary

Miss Hosmer's Motor

The Herreshoff Torpedo Launch

A New Shipping Tag

An Improved Lawn Mower

Some Recent American Patents

Western Iowa Coal Fields

An Improved Press

The Bobac

Miscellaneous Inventions

Supreme Court Decision

Ownership of the Second Term of an Extended Patent

New Automatic Siphon

An Improved Washing Machine

De Kay's Snake

By C. Few Seiss

To Inventors

Communications Received


  • Departments

    Business and Personal

  • Notes and Queries

  • Index of Inventions

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April 05, 1879

20% Sitewide for President's Day