Feature

Apes Work for “Money” and Spend It in Slot Machines

June Evening Skies

Science Theme Carried out through 1933 World’s Fair

Medical Research Conquering Diseases of past Middle Life

New Giant Clover Species Found in Northwest

Genes Declared Impotent as Major Evolutionary Factors

Squeezed Bullets Fired at Mile a Second from New Gun

Front Matter

Thousands of Animals Used Sponge as House

New Spectra Are Explored by German

New Discovery Shows How Films Hold Fast to Metals

Fungi, Thriving on Arsenic, Make Gases That Kill Men