How Honeybees Produce Honeycomb—I
From Nectar the Bees Make Both Honey and Wax, from Wax They Build Cylinders to Hold the Honey
Features
Evolution and Sexuality
Result of Former and Persisting Reaction Between Organism and External Conditions
Kiln-Drying Specifications for Airplane Lumber
Inspection is Inadequate for Airplane Woods and Careful Studies Were Made to Secure Detail Specifications
Wind Resistance and Railway Speeds
How the Model of the Engine Front Affects the Train Speed and Power Consumed
Progress in Naval Aircraft—II
Contributions to Naval Aircraft Design and Construction by the United States, Culminating in the “NC-4” Type
Pulverized Coal—I
Summary of a Report on Methods of Utilizing Otherwise Waste Coal
