The principal collections are the Library of the Folklore Society, deposited in 1911, regarded as one of the foremost collections on the subject in the world; the library of the London Mathematical Society (whose archive the Library also holds), consisting mainly of periodicals but also notably contains 8 pre-1700 volumes, deposited in 1929; the library of the Malacological Society, deposited in 1930, containing 38 pre-1700 volumes on molluscs; the library of the Hertfordshire Natural History Society, including 30 pre-1700 items, of which 6 are incunabula, deposited in 1935; the library of the Huguenot Society, deposited in 1957, which includes the Royal Bounty papers and the Wagner genealogical collections; and the library of the Royal Statistical Society, deposited in 1985.
The principal collections are the Library of the Folklore Society, deposited in 1911, regarded as one of the foremost collections on the subject in the world; the library of the London Mathematical Society (whose archive the Library also holds), consisting mainly of periodicals but also notably contains 8 pre-1700 volumes, deposited in 1929; the library of the Malacological Society, deposited in 1930, containing 38 pre-1700 volumes on molluscs; the library of the Hertfordshire Natural History Society, including 30 pre-1700 items, of which 6 are incunabula, deposited in 1935; the library of the Huguenot Society, deposited in 1957, which includes the Royal Bounty papers and the Wagner genealogical collections; and the library of the Royal Statistical Society, deposited in 1985.