Feature

Parasites Killed by Feeding on Blood of Human Beings

Breaking the World’s Radium Monopoly

Sinanthropus, Ancient Man of China, Knew Use of Fire

Tiny Apparatus Devised to Regulate Radium Treatment

Front Matter

Latest-Found Elements Named after Virginia and Alabama

Plenty of Water Found Better than Little for Nephritis

Maya Indians Have Better Teeth than College Girls

[Photograph]: One Part in a Trillion

Scientists Work to Freshen Stale Air with Electricity

Exact Reproduction Not Goal of Ancient Greek Sculptors

Sunspots and Tree Rings Prove Aid to Engineer