The Comparative Efficiency of Eiffel Surfaces
Studies in Aeroplane Design
Volume 75, Issue 1950supp
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Features
Self-Winding Clock Operated from Water Mains
A New Alpine Railway
Propagation of High-Frequency Electric Waves along Wires—I
Advantages and Limitations of the System for Practical Operation
Annealing Steel in Alternating Magnetic Field
Automatic Deflated Tire Alarm
Oil Films One Molecule Thick
A Direct Measurement of Molecular Dimensions by Simple Experiment
Whence came the First American?
The Probable Ancestor of the Indian Found in Siberia
Pulverized Coal as a Fuel
A Highly Economical Source of Heat
A Simple Rule for Certain Trigonometric Identities
How much Bread will a given Quantity of Flour Make?
The Coloration of Butterflies
Some Striking Examples of Protective Mimicry