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Features

Pneumatic Elevator

The Health of the Workmen of the East River Bridge

Plating with Aluminum

From the Deutsche Industrie Zeitung. by Dr. Clemens Winkler

Combined Pipe Wrench and Vise

Corundum of North Carolina and Georgia

Improved Tool Rest

Road-Building in the Caucasus

How Patterns in Carpets Are Made

Professor Tyndall's First Lecture in America

The Manchester Scientific and Mechanical Society

Malleable Iron

New Method for Sensitizing Collodion

Downfall of the Paper Collar Ring

Professor J. H. Pepper

A Million Dollar Telescope

An Important Patent Extension Denied

Publishers' Card to Advertisers

Underground Railroads

Discouraging Prospects in England

Edwin Marcus Chaffee

Scientific and Practical Information

Hanging Wall Paper

Professor John W. Frazer

William Prescott Smith

Copies of Patents

Answers to Correspondence

Communications Received

Recent American and Foreign Patents

Practical Hints to Inventors

Departments

  • Departments

    Business and Personal

  • Notes and Queries

  • Index of Inventions

  • New Books and Publications

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November 02, 1872

Confronting Common Wisdom