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Forest Ranger Invents Traffic Measuring Machine

Impossible to Judge Intelligence from Pictures

Early Inventors Had Their Troubles

Astronomical Boundaries Legal, Says Survey Board

Botanists Striving to Save Rare Ferns

Gives $350,000 to Start New Scientific Journal

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Cavities in Teeth Due to Special Germ

Crossword Puzzle Makers Overlooked This One

Offerings of the Heavens for 1925

Ancient Plant Fossils Tell of Old Climates

December 31 Only Twelve Hours Long to Astronomers