Feature

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

Sex Determination in Rats Achieved through Diet

Magicians’ Trick Puts Glasses on Museum Guests

Lion and Scorpion

In Science Fields