Feature

Lightning

Erratum: Secretion from Crustacean Eyes Causes Color Changes

Erratum: New Barley Variety Awaits Return of Beer

Erratum: Nature Ramblings: Never Asked for the Job

Erratum: Waterfall Restored with Photograph and Paints

Erratum: First Glances at New Books

Erratum: April Evening Skies

Erratum: In Science Fields: Speed of A.C. Motors Varied with Vacuum Tube

Real Detective Stories Told in Medical Exhibit

Front Matter

American Pyramids Served as Timepieces, Survey Shows

Galaxy of Foreign Scientists Invade Century of Progress