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Objects and Methods of Investigating Certain Physical Properties of Soils

By Lyman J. Briggs

A New Method of Diluting Acetylene

The Density and Molecular Weight of Ozone

Ammonium Amalgam

Engraving Machine


A Century of Civil Engineering

Interlocking Gear for Superheater Valves

Thais and Serapio

Astronomy at the Vatican

The Maned Wolf

The “Electricia” Carriages

A Shallow Draught Steamer for Missionary Work in the Congo

American Locomotives in England.—I

School Room Temperature and Humidity

Trade Suggestions from United States Consuls


Selected Formulze


  • The Suppression of Tuberculosis

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Scientific American Supplements Volume 52, Issue 1337supp

Think Outside the Gift Box