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The Risk of Locks in Flight

Railway Block Signal Legislation

The Thickness of the Earth's Crust

Bolometric Measurements in Wireless Telegraphy

New Sulphur Process for the Preservation of Wood

Botany Up to Date

The Sulphur Mines of Louisiana

By Day Allen Willey

A Railroad Coach Constructed in Forty Hours

By The English Correspondent of the Scientific American

Recently Completed Battleship Nebraska

Our Latest Battleships, South Carolina and Michigan

Tunneling the East River

A Mechanical Electro-Plating Apparatus

By A. Frederick Collins

An Automobile for Rural Free Delivery

By Weldon Fawcett

Business and Personal Wants

READ THIS COLUMN CAREFULLY.--You will find inquiries for certain classes of articles numbered in consecutive order. If you manufacture these goods write ns at once and we will send yon the name and address of the party desiring the information. In every case It Is necessary to give the number of: the Inquiry


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August 04, 1906

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