Note 28 — THE DIARY OF JOHN EVELYN. (continued 2)

He died in 1687, at the great age of 90 years and 6 months. Constantine and his son, Christian Huygens, were both eminent for scientific knowledge and classical attainments; Christian, particularly so; for he was the inventor of the pendulum, made an improvement in the air-pump, first discovered the ring and one of the satellites of Saturn, and ascertained the laws of collision of elastic bodies. He died in 1695. Constantine, the father, was a person of influence and distinction in Holland, and held the post of secretary to the Prince of Orange.