An Extinct Giant-Shark
The Race Probably Died Out through its Own Rapacity
Volume 73, Issue 1893supp
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Features
A Recently Installed System of Electric Train Liǵhtinǵ
Dynamo Driven from the Coach Axle
Internal Combustion Motors for Life Boats
Gasoline Engines Desiǵned to Meet the Severest Conditions of Service
Acclimatization
Can the White Races Become Permanent Populations in the Tropics ?
A School for Colonial Science
The Newest Departure in German Educational Work
International Aviation Cup Defender Desiǵn
Computation of the Principal Features
The Length of Life of Animals
Internationalism in Science
A Movement for Centralization
New Seismometers
Some Records of “Artificial Earthquakes”
Electrophysical Explanation of Gravitation
An Analysis of the Cause of Gravitation and Comparison with the Gravitational Constant on the Basis of Corpuscular Rotation