Feature

Crystals from Soil Bacilli Protect against Pneumonia

Tree Rings Fallible as Records of Weather

Propaganda Served Egypt Four Thousand Years Ago

Rule of Emotionalism Brings Law of Jungle

Nature Ramblings: A Good Word for Rats

Synthetic Female Hormone Pills Considered Potential Danger

First Glances at New Books

Front Matter

A.A.A.S. $1,000 Prize Given for Research on the Atom

Bacteria Digest Shells of Lobsters and Crabs

Geneticist Named President of American Association

Mathematicians Think of Everything as Rubber