Feature

Vampire Bats Pose Menace

Test Detects Measles Five Days before Rash

In Science Fields

Tornado Season Here

“Jet” Shot in Arm

Disease Virus Raised in Embryonic Fishes

Books of the Week

Nature Ramblings: Pussy Willow

Chemist Would Certify U. S. Population “C.P.”

More Widows in U. S. but Proportion Smaller

History of H-Bomb Told by Dr. Teller

Find Cells Affected by Thyroid Hormone