The exertions of CHARLES MURCHISON, who died before Budd, though much younger, were largely devoted to controverting Budd’s views on the germ theory of zymotic diseases. He belonged to the same Aberdeenshire family from which Sir Roderick Murchison the geologist sprang, and was born in Jamaica in 1830. His father, himself a physician, spent his latter days in Elgin, where his son Charles was at first educated. As early as 1845 he entered Aberdeen University, but in 1847-8 he commenced medical study at Edinburgh, and in successive years gained numerous distinctions and considerable note as a diligent and successful student. In 1850 he was Syme’s house-surgeon. In August 1857, when he graduated, he received the gold medal for his thesis on the Pathology of Morbid Growths. He further studied at the Rotunda, Dublin, and in Paris, whence he went to India, being appointed Professor of Chemistry to the Medical College, Calcutta. In this office he was both successful as an experimenter and as an expositor. Later, he went with the army on the British Expedition against Burmah, and utilised the opportunity to make valuable observations on the climate and diseases of Burmah, which he afterwards published. Returning to England in 1855, Murchison became a member of the London College of Physicians, Physician to the Westminster General Dispensary, and Demonstrator of Anatomy at St. Mary’s Hospital. In 1856 he was appointed Assistant-Physician to King’s College Hospital, which office he resigned in 1860, and joined the staff of the Middlesex Hospital. He further held from 1856 the post of Assistant-Physician to the London Fever Hospital, steadily pursuing there as elsewhere his investigations into the nature and causes of zymotic diseases, from which he himself twice suffered in the form of typhus fever, which left in him heart-mischief that ultimately caused his death.