92 
Welch j William H. 
1894. Bacteriological investigations of diphtheria in the United States. (A report 
in behalf of the American committee on diphtheria to the eighth inter- 
national congress of hygiene and demography held in Budapest Sep- 
tember 1-9, 1894.) <Am. J. Med. Soc. Phila., v. 108 (4), n. s., pp. 427- 
461. 
1902. The Huxley lecture on recent studies of immunity with special reference to 
their bearing on pathology. <Bull. Johns Hopkins Hosp., Balto., v. 13 
(141), pp. 285-299. 
Wright, A. E. 
1904. Immunity: opsonines. <Brit. med. joum., Sep. 10, 1904, p. 582. 
o 
