Feature

Forest Fire Fighters Drill Their Own Wells

New Type of Frozen Fruit Being Developed

Grand Stairway Unearthed in Ruins of Monte Alban

Front Matter

[Photograph]: Aerial Mapping with Five-Lens Camera

[Photograph]: Signatures in Clay

Filterable Germ Forms Seen with New Super-Microscope

Most Distant Visible Nebula Seen by Palaeozoic Light

Means Found for Measuring Amount of Vitamin B Needed

Study Shows Cancer Varies with Nationality

Tracks of Cosmic Rays Seen by Experimenters

Cheap Coals, Reduced to Powder, Make Superior Fuel