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No Bids for the New Subway

Accelerating Rate of Growth of our Commerce

Full Electric Service on the New York Central

Quarrying Glacier Ice

The Commercial Supremacy of New York

Health Conditions at Panama

The President's Inland Waterways Commission

Developing Photographic Plates in Daylight

Naosaurus: A Fossil Wonder

By Walter L. Beasley

A Military Wireless Telegraph Equipment

By A. Frederick Collins

The Felling of Factory Stacks

By Our Berlin Correspondent

The Japanese Squadron at Jamestown

By Saito Tsunetaro

The Colorado River Closure

Seldom has a greater victory been won over rebellious nature

By W. D. H. Washington


  • Departments

    The Heavens in May 1907

  • Correspondence - May 4, 1907

  • Recently Patented Inventions - May 4, 1907

  • Index of Inventions - May 4, 1907

  • Notes and Queries - May 4, 1907

  • Patents - May 4, 1907

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