Feature

Fossils of Shark Found in Pennsylvania Rocks

The Electron Is Real

Nerves Act Gland-Fashion in Causing Color Changes

In Science Fields

[Photograph]: Silk: Old and New

Chance Big Pears Have Double Chromosome Count

X-Raying Male Cells Causes Increase in Male Offspring

Archancestral Crocodile Modeled for Museum

Man’s Use of His Hands Depends on His Legs

Evolution Now “Experimental Fact”; Species Made to Order

Acetyl-Choline May Prevent Benzene Deaths

Corona May Be Seen without Eclipses by Means of Television