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By Our Paris Correspondent


Tests of Chemical Manures in the Experimental Fields of Haute-Saône, France

Explosions of Volatile Vapors in Factories

By H. L. Terry

Utilization of Phosphatic Chalks

Anatomy and Habits of the Fish

The Hygiene of the Mouth

By Byron L. Kesler

Contemporary Electrical Science

Frequency of Alternate Currents

A Flint-Stone Piano

Sugar as a Food

On Sea Charts Formerly used in the Marshall Islands, with Notices on the Navigation of these Islanders in General

By Winkler

American Locomotives in England.—III

By A Locomotive Engineer

Wire Rope-Driven Treble Ram Pump

The “Monotype” Composing Machine

Car Lighting by Acetylene Gas

By H. E. Smith

Trade Notes and Receipts

Trade Suggestions from United States Consuls


Selected Formulæ


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