Feature

Ice Floe of Polar Scientists No Longer Is Northernmost

Russia Has More Ills of Youth, U. S. More Senility

Idea of Particles Discarded as Unnecessary for Physics

Climate May Play Part in Infantile Paralysis Immunity

Nature Ramblings: The Date of Christmas

Diver under 320 Tons Pressure at 420 Feet

First Glances at New Books

Front Matter

New-Found Fossils Prove Pithecanthropus Was Human

White Man’s Funny, Too: As Natives See Him

Gonorrhea Cured in 3 Days by Sulfanilamide Treatment

Man Discovered America in Ice Age, Is Verdict