Feature

Erratum: In Science Fields: Vitamin B₂ Used on Rats as Weapon Against Cooties

Erratum: Nobel Physics Prize Honors Machine as Well as Its Maker

First Glances at New Books

Health Gains of 1939 Will Be Carried Onward in 1940

[Photograph]: Balloon Shows Behavior of Star

New Chemical Stops Growth of Pus-Forming Staphylococci

Fourth Pithecanthropus First Adult Male for Study

Undulant Fever Antiserum Helped Three out of Five

Front Matter

Science Progressed in 1939

As War Bars Science Advance Scientists Plan for Peace

Russia’s Men of Fighting Age Outnumber Finland’s 35 to 1