Feature

Mite Forsakes Citrus for Avocado Leaves

Muscles Switched to Help Many Polio Patients Walk

Books of the Week

Moon Will Spoil Meteor Display This Month

Radioactive Gold Helps

Ionized Air Device Measures Plane’s Speed

Observatory Named

U. S. to Probe Rainmaking

In Science Fields

[Photograph]: Cold Test for Jets

10 Viruses Range Globe, May Have Common Ancestor

Jet Pilots Bailing out High Should Hold Chute Opening