Honorary Membership was limited to 10 from 1890-1900, and to 15 from 1901 onwards. Corresponding Membership was a lesser class of Honoris causa membership in the early years. A few honorary members, such as Barnard, were first made corresponding members for a short time before being recommissioned as honorary members.
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|Ryle, Sir Martin||United Kingdom||1973||1983|
|Spencer Jones, Sir Harold||United Kingdom||1947||1960|
|Stratton, Prof. Frederick John Marrian||United Kingdom||1954||1960|
|Denning, Mr. William F.||United Kingdom||1891||1931|
|Espin, Rev. Thomas Espinell||United Kingdom||1894||1934|
|Maunder, Mr. Edward Walter||United Kingdom||1894||1928|
|Williams, Mr. Arthur Stanley||United Kingdom||1909||1938|
|Dyson, Sir Frank Watson||United Kingdom||1916||1939|
|Turner, Prof. Herbert Hall||United Kingdom||1916||1930|
|Ball, Dr. Sir Robert Stawell||United Kingdom||1894||1913|