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The Mitchell Safety Steam Generator

Decision of an Important Patent Litigation

The Genesis of the Horse

The Agassiz Memorial

The Suppressed Member Again

The Origination of Screw Propulsion

Scientific and Practical Information - April 18, 1874

How a Great Discovery Was Made

Artesian Wells

New Electric Disengaging Gear for Knitting Machines

Horton's Improved Chuck Jaw

The Ammonia Ice-Making Process

Improved Steam Pump

Dr. Brown Sequard on Nerve Force

In the Laboratory with Agassiz

Improved Plane Guide

Matson's Safety Combined Whip and Rein Holder

Lucetti's Italian Ice Cream Freezer

Magnifying Insect Case

Casting a Five Hundred Tun Anvil

The Solar Counter

Astronomical Notes - April 18, 1874

Decisions of the Courts - April 18, 1874

Recent American and Foreign Patents - April 18, 1874

How Shall I Introduce My Invention ?

Answers to Correspondents - April 18, 1874

Communications Received - April 18, 1874

Canadian Patents - April 18, 1874


  • Letters

    Correspondence - April 18, 1874

  • Recommended

    New Books and Publications - April 18, 1874

  • Departments

    Business and Personal - April 18, 1874

  • Index of Inventions - April 18, 1874

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April 18, 1874

Of Shamrocks and Science

Happy St. Patrick’s Day