Complex sentence: In 1880, he was elected an honorary fellow of the Royal Meteorological Society of London, which in 1920 awarded him the Symons gold medal, being also a member of many foreign scientific societies.
Split into simpler sentences: In 1880, he was elected an honorary fellow of the Royal Meteorological Society of London, which in 1920 awarded him the Symons gold medal. He was also a member of many foreign scientific societies.