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The Great Railway Tunnel under the St. Clair River, between the United States and Canada

The Smelting of Iron

H. M. S. Blenheim

A Cold Storage Establishment

Problems in the Physics of an Electric Lamp

A Simple Interference Experiment

By Albert A. Michelson

History of the Wheelbarrow

The Musical Bellows

On a New Method and Department of Chemical Research

By G. Gore


By Lord Rayleigh

A Stony Meteorite from Washington County, Kan

The Tananarive Observatory

The Eclipse of the Sun of June 17, 1890

An Infant Prodigy

By S. V. Clevenger

A Chat about Worms

By Hilderic Friend

Useful Engineering Books

Building Plans and Specifications


  • Departments

    Patents- August 23, 1890

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Why We Need Our Zzzs

Why We Need Our Zzzs

Vital for Memory, Mood and More