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The Largest Hydraulic Motor, Photographic Determination of Stellar Parallaxes with the 60-inch Reflector of Mount Wilson Observatory and more

The Locomotive of the Future

By Herbert T. Walker

The United States Lighthouse Service

It Never Ends, Either by Night or Day, Summer or Winter

Strategic Moves of the War—August 11th, 1915

By Matthew E. Hanna

A Notable Step in the Building of New York's Great Piers

Cofferdamming the North River

By Robert G. Skerrett

Farming in Palestine

Agricultural Possibilities of the Holy Land

By Ernest F. Beaumont

Edible Wood, Windmills where Hurricanes Prevail


  • Letters

    Correspondence - August 21, 1915

  • Departments

    Inventions New and Interesting - August 21, 1915

  • Recently Patented Inventions - August 21, 1915

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