1901-2.] Plague Research Laboratory of Government of India. 133 
If, now, we take the population of these same twenty-eight houses, 
and arrange them in three groups according to age, we find that 
the following was the incidence of plague in each : — 
Ages. 
Population. 
Cases. 
Deaths. 
Five years and under 
i inoculated, . 
] not inoculated, 
13 
10 
1 
3 
1 
3 
Between 6 and 59) 
f inoculated, . 
54 
5 
2 
years inclusive | 
[ not inoculated, 
51 
22 
21 
Sixty years and over -| 
f inoculated, . 
[ not inoculated, 
4 
3 
2 
2 
2 
The report of this investigation, submitted to the Government 
of India by Surgeon-General Harvey, naturally produced a very 
great impression on the authorities, and induced them to encourage 
the introduction of this measure into all plague-infected places, and 
no one has been able to throw any sort of doubt on the accuracy 
of the figures. The Indian Plague Commission remark * that they 
have scrutinised the investigation sheets, and find that the “ pro- 
portions of the various ages and sexes were evenly distributed 
among the two classes. The correctness of Mr Haffkine’s figures 
is further confirmed, after making allowance for the deaths 
excluded by him from his calculations, by figures separately given 
to us by Major Bannerman and Mr H. D. Mehta. The experi- 
ment at Undhera appears to us to he the most important experiment 
regarding the effect of anti-plague inoculations that has as yet been 
carried out. It derives its importance firstly from the fact that 
the inoculated and uninoculated persons under observation were 
fairly numerous, and that their numbers were determined with 
a considerable degree of accuracy ; secondly, because the com- 
munities of the inoculated and the uninoculated were comparable, 
* Report of the Indian Plague Commission, vol. v. p. 214. 
Note . — This quotation was taken from the “proof copy” of chapter iv. 
sent out to India, and published there by the Government for general in- 
formation. Since this paper was sent to press it has been compared with the 
complete report of the Indian Plague Commission recently published, and it 
is found that though the meaning remains the same, yet the actual wording 
has been modified to give expression to Dr Ruffer’s doubts regarding the 
accuracy of the statistics aroused by the high death-rate among the 
uninoculated section of the Undhera community. The other members of 
the Commission agree in considering the statistics substantially accurate. 
