Feature

Wild Beasts Have Arthritis but Rats and Bats Are Immune

New Zeppelin Is Described by American Airship Expert

Improve Sulfanilamide for More Potency, Less Toxicity

Nature Ramblings: Cats and Dogs

Two Eclipses

Urges Breeding for Animals but Not for Human Beings

French Steamer in Atlantic to Supply Weather Data

In Science Fields

Chemicals Produce Reaction in Non-Tuberculous Animals

New Service to Prevent Bibliography Duplication

Cosmic Rays May Originate in Destruction of Elements

Front Matter