He invented the weather map and actuarial table, proposed methods for working out the age of the Earth and its distance from the Sun, even devised a practical method for keeping fish fresh out of season.
他发明了气象图和运算表,提出了测算地球的年龄和地球到太阳的距离的法,至发明了一种把鱼类保鲜到淡季的实用法。