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How Honeybees Produce Honeycomb—I

From Nectar the Bees Make Both Honey and Wax, from Wax They Build Cylinders to Hold the Honey

By Edward F. Bigelow

Evolution and Sexuality

Result of Former and Persisting Reaction Between Organism and External Conditions

By Etienne Rabaud

Kiln-Drying Specifications for Airplane Lumber

Inspection is Inadequate for Airplane Woods and Careful Studies Were Made to Secure Detail Specifications

By H. D. Tieman

Wind Resistance and Railway Speeds

How the Model of the Engine Front Affects the Train Speed and Power Consumed

By C. F. Dendy Marshall

Progress in Naval Aircraft—II

Contributions to Naval Aircraft Design and Construction by the United States, Culminating in the “NC-4” Type

By J. C. Hunsaker

Pulverized Coal—I

Summary of a Report on Methods of Utilizing Otherwise Waste Coal

By Leonard C. Harvey

Monel Metal in Turbine Blades, New Case-Hardening Process


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    August 16, 1919

    Science for the Modern World