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One Thousand Ton Hydraulic Shearing Machine


Heating Cities by Steam

By Charles E. Emery

The Locks of the Panama Canal

Gas Fired Steam Boilers

Carey Lea's Photochloride of Silver

By William Lang

An Automatic Intermittent Siphon

Methods of Teaching and Learning Modern Languages

By Charles F. Kroeh

The Chinese Wall a Fact

By J. H. Roberts

Notes on Ethereal Oils

Influence of Magnetism upon Crystallization

By C. Decharme

Experimental Optics

Underground Haulage by Electricity

A New Antiseptic

The Shone Hydro-Pneumatic System of Sewerage

The Saturnia Maia Moth

God's Universe

Building Plans and Specifications

The Girod Cosmograph

Ancient Microscopes

Hair Tonic


  • Departments

    Patents - March 31, 1888

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