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Features

Evolution and Mendelism

The Responses of Organism to Changes in Stimulation

By R. Broom

Memorandum on Hardness

By Robert A. Hadfield

The Planetesimal Hypothesis

The Result of the Close Approach of Two Suns

By Daniel Buchanan

The Expansive Power of Lime

Perpetual Plates for Photography

Two Important American Observatories

Where Practical and Theoretical Work of Great Value is Done

Chemical Nuts to Crack

A Discovery of Prehistoric Ice

Treatment of Overexposed Photographic Negatives

The Prevention of Reversal or Solarization

By R. E. Crowther

A New Thermometer Scale

By Alexander McAdie

Observations upon Ants

Vaporizing Formalin

Can the Velocity of Water be Measured

By Passing an Electric Current Through It

By Walter S. L. Cleverdon

Vibrations, Waves and Resonance—III

The General Principles Underlying Wave Motions

By J. Erskine-Murray

Gas from Hardwood and Heavy Oil

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    February 03, 1917

    Beyond XX and XY

    Biology. Identity. Equality.