THE interesting article by Mr. A. E. Bell on the “Horologium Oscillatorium” in NATURE of August 30 rather suggests that this was Huygens' first book on the pendulum clock. He published a description, ...

Christiaan Huygens was a busy scholar. Among his many achievements, the Dutch scientist figured out the shape of Saturn's rings and discovered that planet's largest moon, Titan. He founded the theory ...