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