Feature

Increase in Death Rate for All Ages Is Predicted

New Stars Believed Limited to Few Definite Brightnesses

Christmas Trees Should Fall as Martyrs to Better Forests

Freezing Food Does Not Kill Botulinus Germ

Change in Soil Texture Keeps Roads from Freezing

Prevention of Tooth Decay Accomplished for First Time

Front Matter

Jungle Ruins Yield Mayan Masterpiece

Stars in American Flag Came from Bottom of Sea

Intercontinental Land Bridges May Have Been Isthmuses

Nature Ramblings: Hermit Crab

Adaptation of Sea Crabs to Terrestrial Life Shown