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In Science Fields

World’s Oldest Joke

[Photograph]: Roof Pools

Birds Fleeing from War Gather on Swiss Lakes

War Most Effective Means of Perpetuating Dictatorships

Substitutes Help Chemists Dodge War-Scarce Items

Rats Aid the Study of Underlying Causes of War

Nature Ramblings: Vanishing Herd

War Volunteers in Canada Show Effect of Unemployment

Traffic Congestion Reduces Gasoline Mileage by Half

First Glances at New Books

German Artillery Has Few Surprises, Says U.S. Expert