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Jablochkoff's Dynamo-Electric Machines

M. Giaffe's Modification of Edison's Carbon Telephone

Laboratory Notes

By John G. Mckendrick

On a New Method of Detecting Overstrain in Iron and Other Metals, and on its Application in the Investigation of the Causes of Accidents to Bridges and Other Constructions

By Robert H. Thurston

The Paris Exhibition—Jurors Representing the United States

A Fifty-Year Old Wooden Bridge

Steam and Check Valves at the Paris Exhibition

Labor in France

New Furnace Feeder at the Paris Exhibition

New Torpedo Boats

The Portuguese Photographic Printing Process

Heliogravure After the Copperplate Style

Brotherhood's Compound Engine at the Paris Exhibition


By David Bachrach

Instantaneous Photography

Specific Gravity

Medical uses of Carbolic Acid

Strumous Disease Treated by Volcanic Vapors

Diseases of the Ear from Bathing

Danger from Hypodermic Injection of Morphia

The New Dental Departure

By L. P. Meredith

The Alkaline Treatment of Burns and Scalds

Recent Progress of Entomology in North America

A Fatherless and Motherless Race

By William H. Gibson

The Enemies of Books

Their Natural History—Their Ravages—The Methods of Destroying Them

The Earthquakes of 1877

A Variation in the Moon's Motion Caused by the Earth's Spheroidal Figure

By D. P. Blackstone

The Mississippi Jetties

An Estimate of Geological Time


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    August 24, 1878

    20% Sitewide for President's Day