Scientific American Magazine Vol 89 Issue 8

Scientific American Magazine

Volume 89, Issue 8

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Features

Modern Searchlights

Frank C. Perkins

The New Chemistry

Fire Peril on Underground Railroads

Foreign Gas Engines at the World's Fair

Langley's Aerodrome Experiments

The Mandatory Blue Print

Egbert P. Watson

N-Rays Discovered by M. Blondlot

The Hudson River Tunnel

The Beaver as a Dam-Builder

Observations of Borelly's Comet at Lick Observatory

W. W. Campbell

The Making of a Lead Pencil

Alfalfa on Western Cattle Ranges

Day Allen Willey

Flowers of Prey

J. Carter Beard

Departments

Recently Patented Inventions - August 22, 1903

Business and Personal Wants

Notes and Queries - August 22, 1903

New Books, Etc. - August 22, 1903

Index of Inventions - August 22, 1903

Patents - August 22, 1903