Feature

Front Matter

Planet Pluto Similar in Size to Our Moon

Study Electricity on Germs for New Light on Disease

Chromosome Structure Details Described by Russian

Complete Huge Disc Intended for 200-Inch Telescope

Scientists Study a Wingless Rooster

First Glances at New Books

Study Region Where Atoms Unite to Determine Forms

[Photograph]: Pavlov in His Laboratory

Nature Ramblings: On Their Own Roots

Artificial Radioelements for Medicine

Hospitals Should Use Radium for Atomic Physics Research