Feature

Need Good “Ear” to Play Fixed-Key Instruments

[Photograph]: Signatures in Clay

Tracks of Cosmic Rays Seen by Experimenters

Ultraviolet Light Used in New Photographic Process

New Type of Frozen Fruit Being Developed

[Photograph]: Aerial Mapping with Five-Lens Camera

Nature Ramblings: Winterberry

First Glances at New Books

Trees Will Die Unless Heavy Rains Fall

Present Geyser Action Theory Needs Changing

British Report Most Potent Form of Vitamin D Yet Known

Electromagnetism Explained by Riemannian Geometry