Feature

Ribbon Microphone Keeps Noises out of Sound Movies

[Photograph]: Recording Baby Earthquakes

Glaciers Caused Geological Moving Days

Scientist Obtains Data on Crow Indian Folklore

Front Matter

Heredity in Mental Disease Urged for Study in Country

Edison and Slosson Talked of Many Things

First Glances at New Books

New X-Ray Device Shows up Human Interior in Relief

Science Loses When Steam Shovel Wrecks Indian Mound

“Universe Maker” Begins Tour of American Cities

Man’s Relative Hairlessness Not Due to Wearing Clothes