Feature

Ancient American Inventions

In Science Fields

Few Mines Protected from Explosions by Rock Dusting

Glandular Extract Fails to Cure Cancer in Mice

Nature Ramblings: Dormant Butterflies

Seek to Prove That Americans Came from Asia

Given Airplane, Ancestors of Lindbergh Would Have Flown

Names of Days Unchanged since Romans Ruled Rhine

Kepler’s Memory Honored at Tercentenary of Death

Notebook of Science

Strange Goats Faint When Frightened

[Photograph]: The Size of the Huge Dornier DO-X