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Features

Endless Traveling or Railway Sidewalk, The Crystallization of Metals and more

Important Trade Mark Decision

The Electro-Magnetic Telegraph

Professor Morse

Clothes Line Reel

Scientific and Practical Information - April 20, 1872

Measuring the Clearness of the Sky

Frictional Gearing - April 20, 1872

By E. S. Wicklin

An Improved Grafting Tool

Winn's Shampooing Apparatus

Gibbs' Whiffletree

Drying by the Direct Application of Heat-Distillation

The Relation of Science to Religion

Piston Rod Packing

Beet Sugar in the United States

The Advance in the Price of Iron

Steam on the Erie Canal

Recent American and Foreign Patents - April 20, 1872

Departments

  • From the Editor

    Correspondence - April 20, 1872

  • Answers to Correspondents - April 20, 1872

  • Recommended

    New Books and Publications - April 20, 1872

  • Departments

    Business and Personal - April 20, 1872

  • Notes and Queries - April 20, 1872

  • Index of Inventions - April 20, 1872

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April 20, 1872

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