Notebook

Humans

From the July 21, 1934, issue

Artificial lightning surpasses nature's own, Dutch Elm disease attacks trees in eastern states, and zinc found to be an essential part of animal diet.

Humans

From the July 14, 1934, issue

Desert plants cope with permanent drought, study of twins gives clues to epilepsy, and airplanes collect weather information in flight.

Humans

Caring for a Historic House

The National Park Service offers advice on taking care of the exterior—or skin—of an old home. From repairing shingles and fixing chimneys to painting trim and improving site drainage, this online course provides handy pointers about what to do and what not to do to keep an historic house in good shape.