Feature

Places Last Bolt in Frame of 200-Inch Telescope

Nature Ramblings: Dinosaurs — and Others

Severe Magnetic Storms Disturb Telegraph and Radio

Rickets Tendency Shown to Be Hereditary

First Glances at New Books

Front Matter

Sugar in Blood Protects against Poison of Alcohol

[Photograph]: Stone Age City

[Photograph]: Giant Hoisting Crane

Obtain Rare Photograph of Vitamin $text{B}_{1}$ Crystals

Chimpanzee Is New Ally in Attack on Drug Problem

Health Authorities Fight New Yellow Fever Threat