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Features

Double-Door Cars for Subway Congestion

Urgent Need for the Catskill Water Supply

The Alleged Patent Office Frauds

Heavy Traffic through the Newly-Opened Hudson Tunnel

Sand Building-Bricks

Experiments with Recent French Aeroplanes

Progress of the Catskill Water Supply

II.--The British Navy of To-Day

A Simple Wireless Telegraph Detector

By Frank J. Kenney

An Improved Washing Machine

Stamp-Affixing Machine

Patent Department - March 7, 1908

Improved Plane Provided with Adjustable Guides

Departments

  • Departments

    The Heavens in March

  • Correspondence - March 7, 1908

  • Index of Inventions - March 7, 1908

  • Patents - March 7, 1908

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March 07, 1908

Think Outside the Gift Box