Feature

Sterile Plants Give Key to New Hybrids

Microbes Eat Insulation of Underground Cables

Mystery Eel Discovered by Fossil Fish Finder

[Photograph]: Powerful Motor

Air Power Long-Range

U. S. Science Department?

Report Factors in Artery Hardening

Railroads Expand Use of “Electric Brakes”

New Machines and Gadgets

Nature Ramblings: “The Lesser Pines”

Front Matter

New Clamps Save Limbs