Feature

[Photograph]: Bareback

Orchids That Look like Girls

Industrial Hygiene Urged to Lengthen Adult Life

New Method Measures Speed of Electrons in Dense Solids

First Glances at New Books

Activity of Pituitary Gland Basis of Test for Pregnancy

Patients Disclose Private Affairs under Drug Influence

Contagion of Typhoid Fever: “A Classic of Science”

Front Matter

New Photo Tube Measures Temperature in Furnace

[Photograph]: Largest of His Time

Evidence Obtained That Space between Stars Not Transparent