Natural Selection-the Darwinian Theory

Improved Machine for Mitering Frames

A New Treatise on Steel

Steamer for Common Roads-Vulcanized Rubber Tires

Circular Floating Batteries and Armored War Vessels

Neuhaus' Tailor's Rest and Seat

Manufacturing, Mining, and Railroad Items

Answers to Correspondents

New Publications

Recent American and Foreign Patents

One Idea Men

Danner's Patent Pencil Guard

New Bock Drilling Machine

Burgess' Patent Window Wiper

Treatment of Apprentices by “Old Hands”

Power Looms in This Country

Progress of the Art of Dentistry

Is Brain Labor Peculiarly Exhausting

Editorial Summary

On the Causes of Explosions Which Occur in the Pouring of Liquid Metals into Water

Patents and Claims

Issued by the United States Patent Office