Feature

Front Matter

Condition of Brain Jelly Said to Be Cause of Insanity

Atoms Combine in Sun’s Atmosphere

300 Projectors Needed to Show Depth Pictures

Finds Men Better than Women as Blood Donors

Rare Element Gives New Kind of Light

Age of Prehistoric Man Measured by Elephant Teeth

Frequent Revolutions Chief Cause of Poor Health

Weather Cycles Make Possible 25-Year Rainfall Predictions

Weed Seed “Horn” Brings Death to Baby Trout

Moonlight as Well as Sunlight Spoils Radio Reception

Carbonic Acid in Air Keeps Earth Warm