Feature

Nudism Unnecessary for Sufficient Ultraviolet Light

X-Ray “Baths” Now Possible for Patients with Tumors

Double Weight Hydrogen Found in Water Electrolysis

Front Matter

Frequent Use of Hypnotism Urged upon Psychiatrists

Russian “Velvet Tree” May Compete with Cork Oak

Millions of American Clocks Have Only Five-Second Error

Malignant Tumors Abound with Fatty Substances

First Glances at New Books

People with “Nerves” Found to Be Most Accident Prone

Hundreds of Monte Alban Tombs Yet Unexplored

Darwin on Missing Links: “A Classic of Science”