Feature

Most Distant Visible Nebula Seen by Palaeozoic Light

Ultraviolet Light Used in New Photographic Process

Cheap Coals, Reduced to Powder, Make Superior Fuel

Study Shows Cancer Varies with Nationality

Means Found for Measuring Amount of Vitamin B Needed

Forest Fire Fighters Drill Their Own Wells

Front Matter

Gravity and Electricity Are Merged in New Mathematics

Electromagnetism Explained by Riemannian Geometry

[Photograph]: Memorial to Columbus

Third Competitor Enters Race for Missing Element 87

Faint Nebulae May Be Most Distant Objects