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Modern Searchlights

By Frank C. Perkins

The New Chemistry

Fire Peril on Underground Railroads

Foreign Gas Engines at the World's Fair

The Mandatory Blue Print

By Egbert P. Watson

Langley's Aerodrome Experiments

N-Rays Discovered by M. Blondlot

The Hudson River Tunnel

The Beaver as a Dam-Builder

Observations of Borelly's Comet at Lick Observatory

By W. W. Campbell

The Making of a Lead Pencil

Alfalfa on Western Cattle Ranges

By Day Allen Willey

Flowers of Prey

By J. Carter Beard


  • Departments

    Business and Personal Wants

  • Recently Patented Inventions - August 22, 1903

  • Index of Inventions - August 22, 1903

  • New Books, Etc. - August 22, 1903

  • Notes and Queries - August 22, 1903

  • Patents - August 22, 1903

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