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The Sandy Hook Mortar Batteries

American Supremacy in the Iron Trade

New Bills for the Regulation of Print and Label Registration

Jubilee Anniversary of the American Science Association

By Horace C. Hovey

The Navies of the World

Ptomaine Poisoning

A Locomotive and its Equivalent in Raw Materials

An Improved Car Coupling

A Dredge Ejector

The New Steel Arch at Niagara

An Automatically Closing Umbrella

The Key of the Gulf--The Tortugas Islands

By C. F. Holder

Pueblo Arts and Industries.–II

By Cosmos Mindeleff

Leonardo Da Vinci's High Angle Mortar


  • Recommended

    New Books, Etc. - April 16, 1898

  • Departments

    Recently Patented Inventions - April 16, 1898

  • Business and Personal - April 16, 1898

  • Notes and Queries - April 16, 1898

  • Index of Inventions - April 16, 1898

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