no ROYAL SOCIETY OF CANADA 



4. Irons. Journal of Hygiene, II, p. 314. 



5. Prescott & IVwis/om;. American Journal of Public Hygiene, 1908, Vol. 18. 



page 19. 



6. iSaragr. Bacteriological Examination of Water Supplies, London. 1906. 



page 222. 



7. Savage, ibid, page 232. 



8. Savage, ibid, page 226. 



9. Houston. Metropolitan Water Board Reports for 1905. Quoted from 



Savage. 



10. Harrison. Centralblatt f. Bakt. II Abte., 14. p. 359, 1905. 



