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Features

The New Willamette River Railway Bridge, Portland, Oregon

Tides and the Rigidity of the Earth

Crust-motion Under the Influence of the Sun and Moon

By A. E. H. Love

An English Self-starting Motor Car

Sixteen Horse-Power Four-cylinder Automobile With Compressed Air Self-starting Device

The Fertility of the Soil

Recent Advances in Agricultural Science

By A. D. Hall

Power Transmission from the Coal Mine

An Experimental Study of Vortex Motion in Liquids—IV

Lord Kelvins's Smoking Model of the Atom

By Edwin F. Northrup

Sinhalese Iron and Steel of Ancient Origin-III

Beginnings of the Iron Age

By Robert Hadfield

Luminescence Analysis

A New Test for Chemicals With the Aid of Violet Light

The Nature, Origin and Maintenance of Life—III

Inaugural Address of the President of the British Association for the Advancement of Science

By E. A. Shafer

The Significance of Photo-Chemistry for the Theory of Vision, “Tempered Copper” Tools

By Von Kries

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    Scientific American Supplements Volume 74, Issue 1920supp

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