Feature

Leukemia Disease of Blood Combated by Rabbit Serum

Two Germs May Cause Blindness of Trachoma

Invention Makes Electricity Directly from Sunlight

Cotton Was Raised in Year One by Indians of Arizona

Mauna Loa, Hawaiian Volcano, Will Erupt within Three Years

Oldest American Newspaper Still Well Preserved

First Glances at New Books

Auto Knock Photographed in Cylinder Head

Heavy 1931 Seismic Record Brings 31 Quakes in 3 Months

American Diet Lacks Vitamins despite Nutrition Publicity

Huge Egyptian Sarcophagus Found by Americans

200,000,000 Bushels of Wheat to Come from Russia