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Scientific American Magazine Vol 81 Issue 4

Scientific American Magazine

Volume 81, Issue 4

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Features

Spain Sells Cruisers

The Wage of Original Research

Floating of the Paris

Comparative Operating Cost of Horse and Electric Delivery Wagons

Animal Tool-Users, Engineers, and Mechanics

James Weir

Time of Transatlantic Passage Again Reduced

Brooms as Germ Breeders

A Simple Tool for Cutting Pipes

A Simple Mold for Composition Rollers

The Eastman

Moving a 500-Ton Train-Shed Arch

Niagara Falls Power Plant

Alessandro Volta

A Catalina Walking Fish

C. F. Holder

To Inventors July 22, 1899

Departments

Correspondence - July 22,1899

Recently Patented Inventions - July 22, 1899

New Books, Etc. - July 22, 1899

Notes and Queries - July 22, 1899

Index of Inventions - July 22, 1899

Business and Personal - July 22, 1899

Patents -July 22, 1899