Feature

Front Matter

Flour Made from Dried Fish Becomes Valuable Food

Bureau of Standards First in This Country to Liquefy Helium

Synthetic Lubricating Oil Made out of Paraffin Wax

Auto Knock Photographed in Cylinder Head

Leukemia Disease of Blood Combated by Rabbit Serum

[Photograph]: Most Powerful X-Ray Tube for Medical Use

Star Observed for First Time as Disc, Not Point of Light

Rheumatism Vaccine Promised by Minnesota Experiments

Heavy 1931 Seismic Record Brings 31 Quakes in 3 Months

[Photograph]: Do Animals Laugh?

Nature Ramblings: Human Ant Eaters