Feature

Set Important New Date for American History

In Science Fields

Fabrics of the Future

Mimosa Trees Menaced by New Fungus Disease

Find Pituitary Extract Influences Use of Sugar

Shrimp Embryos Survive Six Months without Air

Low Birth Rate Linked with Finland’s Economic Progress

First Glances at New Books

Front Matter

New Theory of Relativity Devised by M.I.T. Scientist

Neutrino Has No Weight at All Yet Can Carry off Energy

[Photograph]: Neon Tube Test