Feature

Filtrable Germs Need Not Be Extremely Small

Height of Shooting Stars Measured with Wire Frame

Nature Ramblings: Whiskey-Jack

Einstein Read Philosophy When Only 13 Years Old

First Welded Penstock Built in California

Front Matter

Science Internationalism Aided by “Scientific Immigrants”

Field Museum Visitors See Bit of Abyssinia

Industrial Inch Loses Two Millionths of Length

Roosevelt Medal Presented to Dr. Robert A. Millikan

British to Attack Mt. Everest from Ground and Air

Original Greek Read to Infant in Lengthy Test of Memory