Feature

Babies Imitate without Any Need for Teaching

New Kind of Star Group Discovered at Harvard

New Sex Hormones Aid in Studies of Gland Ailments

Front Matter

Cosmic Rays May Originate in Destruction of Elements

Wild Beasts Have Arthritis but Rats and Bats Are Immune

Audubon 100th Anniversary Marked by Exhibit of Art

Improve Sulfanilamide for More Potency, Less Toxicity

New Zeppelin Is Described by American Airship Expert

Urges Breeding for Animals but Not for Human Beings

French Steamer in Atlantic to Supply Weather Data

In Science Fields