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Our System of Naval Comparison

Value of Correct Propeller Design

Precautions against Poisoning the Queen Bee

The Eiffel Tower

The Fuel Supply of the Japanese Navy

The Hydroscope and Its Success

The Current Supplement

Progress in the Study of Radium and Radioactivity

A Practical Primary Battery

Boiler Scale Detection

By George J. Jones

Safety Locomotive for Explosives Factory

The Japanese Navy

Results of the Florida Automobile Race Meet

A Great Engineering Feat

By G. P. Blackiston

The Blue Gnu

Natural Monuments

By Charles F. Holder

Business and Personal Wants


  • Departments

    Legal Notes - February 13, 1904

  • Recently Patented Inventions - February 13, 1904

  • Notes and Queries - February 13, 1904

  • New Books, Etc. - February 13, 1904

  • Index of Inventions - February 13, 1904

  • Patents - February 13, 1904

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