Paris: Institute PAsteur, 1907. paperback. Illustrated. 19pp., 8vo, stiff beige wrappers. (Paris: L'Institute Pasteur), 1907. Very good. very good.
Laveran and Mesnil discovered that trypanosomes could be maintained indefinitely in rats and mice by serial passage. In the Annales de l'Institut Pasteur, vol. 21, no. 8, 1907.