Feature

Health Service Officer Contracts Spotted Fever

New Kind of Space Year’s Discovery in Mathematics

Controllable Pitch Propellers to Be of Wood and Plastic

Name Jehovah Derived from “To Be Kindly”

Front Matter

Now a Machine That Talks with the Voice of Man

Research By-Product Saved $500,000 during Depression

Plant Tissues Shown to Have Potential Immortality

Our Milky Way Extends for 60,000 Light Years

Changes in Gravity May Warn of Earthquake

Scientists Organize to Study Social Aspects of Science

Pupils Kept in Ignorance of Facts of Life Sciences