46 
The Philippine Journal of Science 
4. In spite of antitoxin treatment, the mortality is higher than 
in other countries, which condition may be due to a greater 
prevalence of laryngeal cases. 
5. Post-diphtheritic paralysis is not of frequent occurrence, 
and our data regarding it are meager and incomplete. 
We desire to acknowledge our appreciation of the courtesy 
of Drs. Florentine Ampil, H. W. Wade, and Jose Albert in 
placing at our disposal the records of San Lazaro Hospital, of 
the pathological department of the University of the Philip- 
pines, and of the pediatric department, Philippine General Hos- 
pital, respectively. 
REFERENCES 
V 
1. Brownlee, J. Statistical studies in immunity. Journ. Hyg. 5 (1905) 
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2. Del Rosario, S. V. Report of the Philippine Health Service for the 
year 1917, page 63. 
3. Hibbard and Burrows. Cited by W. P. Northrup in Nothnagel’s En- 
cyclopedia of Practical Medicine. American edition, Philadelphia 
(1902). 
4. Kolmer, J. A., and Moshage, E. L. A study of various methods for 
determining the virulence of diphtheria bacilli. Journ. Inf. Dis. 19 
(1916) 1. 
5. Osler, Wm. The Principles and Practice of Medicine, 8th ed., New 
York (1917) 61. 
6. Park, W. H., and Bolduan, C. The Bacteriology of Diphthei’ia. Edited 
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