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Features

Pneumatic Elevator

Plating with Aluminum

From the Deutsche Industrie Zeitung. by Dr. Clemens Winkler

The Health of the Workmen of the East River Bridge

Combined Pipe Wrench and Vise

Improved Tool Rest

Corundum of North Carolina and Georgia

Professor Tyndall's First Lecture in America

How Patterns in Carpets Are Made

The Manchester Scientific and Mechanical Society

Road-Building in the Caucasus

Malleable Iron

New Method for Sensitizing Collodion

Professor J. H. Pepper

Downfall of the Paper Collar Ring

Discouraging Prospects in England

An Important Patent Extension Denied

A Million Dollar Telescope

Underground Railroads

Publishers' Card to Advertisers

Professor John W. Frazer

Hanging Wall Paper

Edwin Marcus Chaffee

William Prescott Smith

Scientific and Practical Information

Copies of Patents

Answers to Correspondence

Recent American and Foreign Patents

Communications Received

Practical Hints to Inventors

Departments

  • Departments

    Notes and Queries

  • Business and Personal

  • Index of Inventions

  • New Books and Publications

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November 02, 1872

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