Feature

Harry L. Smithton, Trustee, Dead of Heart Attack, Aug. 5

First Tree Felled by Man

Carbon Dioxide Attractive to Female Mosquitoes

New Machines and Gadgets

Front Matter

Gum Reduces Decay

Fatal Diseases Stopped

[Photograph]: Model Oil Field

Skin Flap Operation Relieves Neuralgia

Summer Sneeze Season

Wiggling Toes Speeds Blood Flow, Isotopes Show

Arteries Make Chemicals