Feature

Nature Ramblings: Watch Parent Trees

Plant Tissue in Test Tubes; Made to Develop Small Plants

Sex Determination in Rats Achieved through Diet

[Photograph]: Comet Hassel

Correction

First Total Synthesis of Sex Hormone Equilenin

Texas’ New Telescope Giant Goes into Action in May

In Science Fields

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

Several Hundred New Products Are Now Ready for Market

First Glances at New Books

Front Matter