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A New Amalgamator

Improved Switch Signal and Alarm

Business and Manufacturing Items

Science Familiarly Illustrated

Paris Exposition--The Chaotic Stage

Editorial Summary

Gleanings from the Polytechnic Association

The Tricks of the Alchemists

Steam Boilers--Their Form, Construction, and Material

Breakage of Car Wheels--The Causes and Remedies

Lipp's Ice Cream Freezer

The Golden Hegira

Answers to Correspondents

What is the Theory of the Water Polish?

Recent American and Foreign Patents

Are Our Coal Fields Inexhaustible?

The Dangers of Our Artificial Lights

Phonography and Photo-Phonography

Our Street Pavements


American Exhibitors at the Paris Exposition

Patent Claims

Extension Notices

Custer's Improved Toe Calk for Horses' Shoes

Fay's Roofing, Flooring and Weather-Boarding Paper

How to Obtain Patents


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May 04, 1867

Confronting Common Wisdom