SHERWOOD: ON DIFFERENTIAL STAINING METHODS. 35 



9. MoELLER. Deutsche Med. Zeitung. 1898, p. 135: Centralbl. f. Bakt., 

 Orig. No. 7, March, 1902, p. 278; Deutsche Med. Wochenschrift, 1898, 

 p. 376. 



10. Marzinowski. Centralbl. f. Bakt., 1900, 28, p. 39. 



11. Frixkel. Berl. Klin. Wchnochi., 1898, 35, pp. 246, 880. 



12. Rabinovitch. Deut. Med. Wchnochi., 1900, 26, p. 257. 



13. Rabinovitch. Zeitschrift f. Hygiene, etc., 1897. 



14. KoRN. Centralbl. f. Bakt. 1899. 



15. Abbot and Gildersleeve. Univ. of Penn. Bulletin, .June, 1902. 



16. Patterson. .J. Med. Research, Vol. 22, No. 2, April, 1910. 



17. Spengler. Deutsch. Med. Wchs., Bd. 31, 1905, S. 1228 and 1353; 



ibid, Bd. 33, 1907, S. 337. 



18. Much. Beitr. Z. Klin. d. Treber., Bd. 8, 1907, S. 85 and 357. 



19. Wherry. J. Inf. Dis., Vol. 13, July, 1913, No. 1; pp. 144-154. 



20. CowiE. J. Exp. Med., Vol. 5, 1900-'01, p. 295. 



Note. — For a discussion of the metabolism of the acid-fats group and 

 confirmation of part of Wherry's work, see Kendall, .J. Inf. Dis., Vol. 15, 

 1914. For the causes of acid-proof nes.«. see Ritchie, .J. Path, and Bact., 

 1905, 10, pp. 334, and Wills, Centralbl. f. Bakt. I, original, 1912, 61, p. 37. 



