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Scientific American Magazine Vol 101 Issue 12

Scientific American Magazine

Volume 101, Issue 12

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Features

The Composition of the Upper Atmosphere

Report of the Chief of Ordnance

Honor to Whom Honor is Due

Electricity

Science

Engineering

Rat Destruction by Electric Current

An Automatic Electric Fog-Signaling Apparatus for Railroads

Portable Outlooks for Artillery Trains

Alfred Gradenwitz

Early Suggestions of Invading England by Balloon

Latin-American Trade

Trees as Witnesses in Early Surveying

A Heat Paradox

Sheet Lightning

Commander Peary's Discovery of the North Pole

How Cook Made His Latitude Observations

Capt Cody's British Army Aeroplane

A Cheap Lamp Rheostat

F. P. M'dermott Jr.

Temporary Repairs to Broken Springs

Simple Tapered Reamer

Albert F. Bishop

Handy Man's Workshop

Vise for Polished Pipe

A. V. Searing Jr.

The Cold Process of Making Sirup

Thaleon Blake

Departments

Correspondence

Recently Patented Inventions

Patents

Index of Inventions