1901-2.] Plague Research Laboratory of Government of India. 129 
Between that date and 12th February, when the inoculations 
were performed, seventy-six persons died of plague, ten left the 
village, and five were born, thus leaving 950 persons alive on the 
latter date. This mortality is equivalent to a death-rate of 766 per 
mille per annum , and will serve to show how virulent the epidemic 
was. On the 12th of February Mr Haffkine and I visited the 
village, accompanied by the chief plague officials of Baroda State 
and some half-dozen local medical men who had just been instructed 
in the art of inoculation. The witnesses of the experiment were 
therefore fairly numerous and representative. The village was 
divided into two halves, Mr Haffkine operating in one section and 
I myself in the other. Our mode of operation was as follows : — 
We went from door to door, calling out the people by name by 
reference to the census paper. As each household was collected 
in the street, half of the members were inoculated, and half left 
untreated to serve as controls. An endeavour was made to divide 
equally the men, women and children in each household, and to have 
an equal number of sickly in the two groups. That the division 
effected was a fair one will be manifest from the following table, 
which shows the sex and age distribution of the inhabitants of the 
twenty-eight houses in which plague cases occurred after the inocu- 
lation. A subsequent examination also showed that there were, at 
the time of operation, more sickly individuals among those inocu- 
lated than in the uninoculated group, so that the balance was in 
favour of the latter in this respect. 
Ages. 
Inoculated. 
Not Inoculated. 
Five years and under, | 
Between 6 and 59 f 
years inclusive. \ 
Sixty years and over, | 
Males, . . 4 \ q 
Females, . 9 J 
Males, . - 34 ) _ 4 
Females, . 20 \ 
Males, . . 3 \ . 
Females, . 1 J 
Total, . 71 
Males, . . 5 ) 1n 
Females, . 5 i 
Males, . . 18 ) 
Females, . 33 \ 0 
Males, . . 1 j q 
Females, . 2 / 
Total, . 64 
No difficulty was experienced in inducing the people to be 
inoculated ; in fact, one had to refuse to go beyond the half in each 
family in spite of the protests of its members. When we summed 
up at the end of the day, it was found that we had inoculated 513 
persons, or 76 more than the half. The village was then left in 
PROC. ROY. SOC. EDIN. — YOL. XXIY. 9 
