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The Panama Canal as an Investment, Relative Repairs on Navy-Built and Contract-Built Ships and more

Engineering, Electricity, Science

A New Type of Torpedo Boat

A Double-Hulled Boat with its Engines Entirely Below the Waterline

Trackless Electric Trolley-Drawn Sleigh in Norway

By Frank C. Perkins

The Earliest Story of the Deluge

Prof. Hilprecht's Remarkable Discovery

Novel Changeable Photographs

By F. Honore

Mother-of-Pearl Imitations

Notes on Overhauling a Boat

By Albert F. Bishop

Properties of Polonium

By E. Rutherford

The Revolving Safe, The Action of Radium Emanation Upon the Element of the Carbon Group


  • Departments

    The Heavens in April

  • Recently Patented Inventions

  • Notes and Queries

  • New Books, Etc.

  • Index of Inventions

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