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Out-letters of Peter Chalmers Mitchell (Also contains out-letters of M B Saunders, Poultry Department, from 20 Feb 1917-26 Jul 1917)

Correspondence with Professor R T Leiper of the London School of Hygiene and Tropical Medicine regarding an Institute of Comparative Medicine at the Zoological Society of London

Report of the Helminthologist, T. Leiper, covering 8 years. Helminthology is the study of parasitic worms.