Feature

Fifth Dimension Invented

Mosquitoes Survive Cold

X-Raying Mold Boosts Production of Penicillin

Advanced German Method for Oxygen Determination

Books of the Week

New Machines and Gadgets

Nature Ramblings: Flower of the Nymphs

Front Matter

Heavy Nuclei Hit Earth

[Photograph]: Six-Jet Bomber

All Helium in Meteorites Due to Cosmic Radiation

Electrical Insulation Tape Neither Burns nor Chars