Feature

Camera Pictures Beauty and Progress at Hoover Dam

Fingerprints May Be Used to Protect Checks from Forgery

Poor Health Record for 1933 Indicated by Early Reports

Front Matter

Icebergs in the North Atlantic: “A Classic of Science”

Cooperative Phenomena New Term in Physics

First Glances at New Books

Earthquake Was Not Noticed by Einstein

Cheap Chemical Prevents Rancidity in Oils and Fats

Nature Ramblings: No Snakes for St. Patrick

First Glances at New Books

Mathematical Formula Describes Legislator’s Vote