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Features

Portable Spring Grist Mill, Price's Composition Pavement and more

The Tobacco Manufactories in Brooklyn

The Government Works at Hell Gate

Palmer's Stave Jointing Machine

A Patent Office Curiosity, and a Specification in Rhyme

The Discovery and History of the Chromosphere

By J. H. Leach

Frictional Gearing

By E. S. Wicklin

Society of Arts of the Massachusetts Institute of Technology

Valuable Photographic Improvement

Friction Gearing II

By E. S. Wicklin

The Holtz Electrical Machine

Scientific and Practical Information - April 6, 1872

Currier's Tea and Coffee Pot Stand

Kehoe's Improved Striking Bag

Small Pox--Its Prevention--The Treatment of Patients with Reference to the Protection of the Public

A Remarkable Telegraphic Improvement

Epidemics of Disease, Disaster, and Crime

African Diamonds--An Invention Wanted

The Present Status of Organic Chemistry

Recent American and Foreign Patents - April 6, 1872

Departments

  • From the Editor

    Answers to Correspondents - April 6, 1872

  • Letters

    Correspondence - April 6, 1872

  • Recommended

    New Books and Publications - April 6, 1872

  • Departments

    Business and Personal - April 6, 1872

  • Notes and Queries - April 6, 1872

  • Index of Inventions - April 6, 1872

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