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

The Electro-Magnetic Telegraph

Important Trade Mark Decision

Professor Morse

Frictional Gearing - April 20, 1872

By E. S. Wicklin

Clothes Line Reel

Measuring the Clearness of the Sky

Scientific and Practical Information - April 20, 1872

Gibbs' Whiffletree

Winn's Shampooing Apparatus

An Improved Grafting Tool

Piston Rod Packing

The Relation of Science to Religion

Drying by the Direct Application of Heat-Distillation

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


  • From the Editor

    Correspondence - April 20, 1872

  • Answers to Correspondents - April 20, 1872

  • Recommended

    New Books and Publications - April 20, 1872

  • Departments

    Notes and Queries - April 20, 1872

  • Business and Personal - April 20, 1872

  • Index of Inventions - April 20, 1872

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