a Bous FIELD Cbeemabons om Hol Azar pias | WELLCOMI INSTITUTE ¥ | _LIBRARY | OF THE WELLCOME RESEARCH LABORATORIES GORDON MEMORIAL COLLEGE KHARTOUM by RECTOR Fellow of the Reyai Institute of Public Health, the Society of Tropical Medicine and Hygiene, and the Society for the Destruction of Vermin; Meraber of the Incorporated Society of Medical Officers of Health, and the Association of Economic ANDREW BALFOUR, M.D., B.Sc., F.R.C.P. Epiy., D.P.H. Cams.

{ ee Biologists; Corresponding Member Société de Pathologie Hxotique; Medicai Officer of Health, Khartoum; etc.

if PUBLISHED FOR DEPARTMENT oF Epucation, SuDAN GOVERNMENT KHARTOUM BY | BAILLIERE, TINDALL & COX, 8, Hewramrra Srrezt, Covent Garpen, Lonpon | 1908 [COPYRIGHT ‘ NREL 2200060515