Volume 19, Issue 15
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Features
Natural Selection-the Darwinian Theory
A New Treatise on Steel
Steamer for Common Roads-Vulcanized Rubber Tires
Neuhaus' Tailor's Rest and Seat
Circular Floating Batteries and Armored War Vessels
Manufacturing, Mining, and Railroad Items
Recent American and Foreign Patents
New Publications
Answers to Correspondents
Danner's Patent Pencil Guard
One Idea Men
Burgess' Patent Window Wiper
New Bock Drilling Machine
Is Brain Labor Peculiarly Exhausting
Power Looms in This Country
Progress of the Art of Dentistry
Treatment of Apprentices by “Old Hands”
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