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Conditions of the Moon

Has It Passed Through a Glacial Period?

By P. H. Puiseux

Pocket Stoves of Japan

By N. Kawaguchi

Light, Power and Irrigation in California

Childhood among the Labrador Eskimo

An Amateur's Observatory

An Attempt to Make Observation Comfortable in Cold Weather

By Russell W. Porter

Mechanical Power of the United States

Melting Furnaces at the British Mint

The Electrical Properties of Gases—IV

Which Enable Important Problems in Physics To Be Studied

By J. J. Thomson

Determination of Carbon in Steel by Micrographical Examination

Removal of Stains in the Laundry

Barometric Gradient for Discovering Unknown Seismic Zones

New Carbon Remover

The Zeiss—Abbe Refractometer

Method for the Detection of Phosphorus

Motorcycle Machine—Gun Batteries

Their Important Work in the War

Workers in Compressed Air

Precautions Adopted by the N. Y. Public Service Commissson for Protecting Their Health

By Edward Levy

Irrigation Works on the Blue Nile

Paper Yarns

Alcohol from Carbide in Switzerland

An Arc Light for Projection Lanterns

A Government Fur Farm

Shall We Eat Corn Meal?

A Question of World Economics

By M. Helen Keith

A Telescope as a Seismograph

Loom Weaving among the Igorots

Avoiding Collisions at Sea

Rust Prevention in Ferro—Concrete

A Workshop Method of Determining the Refractive Index of a Block of Glass, of which only one Face is Polished

By Reginald S. Clay

The Wireless Storm Detector

Its Influence Upon the Operation of Lighting Central Stations

By W. H. Lawrence

Some Birds of the Yellowstones

Unusual Specimens Seldom Observed by Traveler

By M. P. Skinner

Providing for Braking Stresses on the Quebec Bridge

Earthquakes more Frequent at Night


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