Feature

Yellow Fever Serum Assures at Least Two-Year Protection

Nursery Rimes Traced to Ancient Spells

Nature Ramblings: Oil-Bird

Heated Gypsum Becomes Useful, Thirsty Chemical

Frog Tadpole Tails Successfully Transplanted

Tests of Radio during Eclipse of Sun Urged

Expedition Will Study Sargasso Weed and Flying Fish

Nature Ramblings: Trouble by Threes

First Glances at New Books

Prizes for Discovery of Vitamin Requirements

Front Matter

Accuracy of History Checked by Study of Famous Bones