G. D. Maynard 
The chief constants of the curve are given below : — 
375 
Indian* 
Buist's 
Buist's modified 
Mean 
Standard Deviation 

/32 
<i 
Start 
End 
2- 1577 +-0147 
1 -82310 ± -0U3 
1-03961 + -01974 
3- 23810+ -9395 
-2-7660 
- -3885 
-2639 
8-3229 
1-8928+ -1193 
l-8725± -0844 
1-2896+ -1561 
3-6814+ -3122 
-3-6267 
- -5640 
-3320 
7-9110 
2- 1273+ -1193 
1-8580 ±-0844 
1-0025 ±-1561 
3- 1054+ -3122 
-2-8040 
- -3551 
-1889 years 
8-1210 years 
It will be seen from these figures that the three curves are not very dissimilar 
and that the Indian has a value intermediate between the other two. It seems 
safe therefore to assume that in the cases quoted by Major Buist we are dealing 
with a sample of the general population not modified in this respect by inocula- 
tion, and that no deductions in support of this process can be drawn from this 
distribution. 
From a study of these figures it would appear that the case for anti-typhoid 
inoculation is at present not a strong one, and before the real results of the 
process can be determined with any approach to satisfaction the effect of diseases 
of the para-typhoid type must be eliminated from the returns by careful diagnosis 
based on bacteriological processes. Although the correlation is not nearly as high 
as is usually found for the cases of " recovery from small-pox in the vaccinated," 
the general trend is to show a positive result in favour of the process, and this is 
particularly so in the examples where it is most reasonable to assume that one is 
dealing with true Typhoid Fever. Whether a polyvalent vaccine would be more 
efficacious or not, is a matter for the expert bacteriologist ; but I feel convinced 
that so long as the para-typhoidal diseases are overlooked, either in the pro- 
phylactic treatment or in the statistics, more definite results will not be obtained. 
At present the statistics are not all that might be desired, but I understand 
that the Army authorities are making a special effort to obtain reliable figures 
in the future, and it is only from this source that we can hope to obtain 
sufficient data. 
My excuse for presenting this paper at the present time in its admittedly 
incomplete form is the importance of the subject, not alone to the Military 
Authorities, but to all those living in the South African and other colonies, 
where Enteric Fever is a perennial scourge, which if regarded only from its 
financial aspect is a very serious question. 
* The probable error in the Indian figures is calculated taking jV=7000 as this was approximately 
the actual number from which the ratios were reduced. In the other cases iV=ll'2. 
