PROTECTIVE INOCULATIONS. 



307 



"Many of the prisoners on being told about preventive inoculation wished 

 to be inoculated, and M. Haffkine, who had previously been communicated 

 with, and whose zeal and enthusiasm in the cause that he so well advocates 

 are beyond praise, arrived here on the 18th July, and in the presence of Sur- 

 geon-Colonel Harvey, who kindly assisted, and myself, inoculated 147 

 prisoners, and on the 19th 68, making a total of 215 out of 433 present in the 

 jail on that date. 



"Being- purely voluntary, no selection of prisoners was possible ; but all 

 classes in the jail were represented, male and female, old and young, habit- 

 uals and less frequent offenders, strong and weakly, convalescent and even 

 hospital patients sent their representatives. No difference of any kind w T as 

 made between inoculated and non-inoculated prisoners ; they were under 

 absolutely identical conditions as regards food, water, accommodation, etc., 

 in short, in every possible respect. 



" As, owing to the progress of the epidemic, a large number of prisoners 

 were removed from the jail into camp, it will be found convenient to con- 

 sider the effect produced by the anticholera inoculation under three head- 

 ing^ : 



"(a) TJie first will include the period from the 18th July, the date of first 

 inoculations, to the 24th July, the date on which final reinoc illations were 

 made, and refers to all the prisoners. 



" (b) Tlie second concerns the prisoners who remained in jail after the 

 majority were removed into camp, and comprises the period from 25th July 

 to 2d August, on which date the final case occurred among this body of 

 prisoners. 



' ' (c) The third refers to the body of prisoners who were moved into camp 

 on 25th July, and includes the period between that date and 1st August, 

 when the final case occurred among this body. 



" The conclusions to be drawn from the results above recorded appear to 

 me to be that for the first few days the inoculations have scarcely any protec- 

 tive influence : then their effect seems to gradually increase. M. Haffkine in 

 nis publications has laid stress on the fact that he anticipates a period of ten 

 -days would elapse from date of first inoculations before the full effect would 

 be obtained. 



Inoculated 



Not inoculated. . 



