21. For many years Mason was an officer of the American Microscopical Society of New York. 22. In retirement he turned to microscopical research, making contributions in the field of palaeontology. 23. In 1885, she was elected the first female Fellow of the Royal Microscopical Society. 24. He co-founded the Chicago Microscopical Club in 1868 and was its first president. 25. In 1740 he was elected fellow of the microscopical observations on the crystallization of saline particles. 26. He was one of the twelve founder ( 1849 ) members of the Dublin Microscopical Club. 27. He graduated with a Master of Arts qualification and became a Fellow of the Royal Microscopical Society. 28. He belonged to the Royal Meteorological Society ( president 1865 1866 ) and the Royal Microscopical Society. 29. In 1976 he was elected to the honorary Fellowship of the Royal Microscopical Society, Oxford England. 30. In 1995, he was invited by the Royal Microscopical Society to give the inaugural CYTO lecture.
