184 CELLS, DIRT AND DEBRIS 



14. Savage. Rpt. of M. O. to L. G. B. 1906-07, 228-236. 



15. DelSpine. Rpt. to Manchester Sanitary Committee. 1908. 



16. Houston. Rpt. to London County Council. No. 933. 1905. 



17. Revis. Jour. Roy. Inst. Pub. Health. 1908, 56, 734. 



18. Tonney. Amer. Jour. Pub. Health. 1912, 2, 280-281. 



19. Schroeder. Amer. Jour. Pub. Health. 1914, 4, 50-64. 



