The value of such protective inoculations is demonstrated in the treatment against small-pox (Jenner), cholera, plague (Haffkine) and typhoid (Wright and Semple).
A commission, consisting of Sir Lawrence Jenkins, Lieut.-Colonel Bomford, M.D., principal of the Medical College, Calcutta, and Major Semple, R.A.M.C., director of the Pasteur Institute, Kasauli, was appointed by the government of India to inquire into the disaster.
The specialization which accompanies the division of labour has important geographical consequences, for it necessitates communi 1 On the influence of land on people see Shaler, Nature and Man in America (New York and London, 1892); and Ellen C. Semple's American History and its Geographic Conditions (Boston, 3903).