Feature

Forest Ranger Invents Traffic Measuring Machine

Impossible to Judge Intelligence from Pictures

Early Inventors Had Their Troubles

Botanists Striving to Save Rare Ferns

Germs Furnish Growth Promoters for Plants

Gives $350,000 to Start New Scientific Journal

Crossword Puzzle Makers Overlooked This One

Ancient Plant Fossils Tell of Old Climates

December 31 Only Twelve Hours Long to Astronomers

Sulphur Found Ideal Apple Spray

172942

Ice Age Probably Known in First Geological Period