Feature

War-Service Register of British Scientists

Best Cities Distinguished by Dentists, Not Clergymen

Nature Ramblings: Vegetable Cinderellas

Mr. Ape Doesn’t Learn Well When Mrs. Ape Is Teacher

Mesotrons, in Upper Air, Produced by Cosmic Rays

President Invites Scientists to Sail on Navy Ships

First Glances at New Books

Front Matter

Severe Facial Neuralgia Treated with Vitamin $text{B}_{1}$

[Photograph]: Comet Hassel

Plant Tissue in Test Tubes; Made to Develop Small Plants

Texas’ New Telescope Giant Goes into Action in May