90 SPECIFICITY OF RICKETTSIA PROWAZEKI 



Record of Guinea-pig 36, inoculated with the viscera of 

 louse 1 of Box XXXIV 



Temperatures following the inoculation on May 22d: 



F. F. 



May 22 No record June 10 102.4 



23 103.0 11 101.0 



24 102.2 " 12 101.8 



25 103.1 13 102.0 



26 102.4 " 14 102.8 



27 103.2 15 102.0 



28 103.0 16 102.0 



29 103.4 17 No record 



30 103.1 18 103.0 



31 102.8 19 102.6 



June 1 102.0 20 No record 



, 2 102.2 21 103.0 



3 101.8 22 No record 



4 101.0 23 102.6 



5 101.8 24 No record 



6 102.0 25 102.0 



7 101.8 26 No record 



8 102.0 27 101.6 



9 102.2 



On June 28th this guinea-pig was inoculated intraperitone- 

 ally with 5 c.c. of blood from patient 814. The subsequent 

 temperatures were as follows: 



F. F. 



June 28 102.4 July 12 103.1 



29 No record 



30 102.2 



July 1 102.1 



" 2 No record 



3 104.3 



" 4 103.3 



5 103.0 



6 No record 



7 103.2 



8 102.9 



9 No record 



10 102.5 



" 11 . . 102.6 



13 102.8 



14 103.4 



15 No record 



16 102.6 



17 103.0 



18 102.4 



19 102.9 



20 102.1 



21 No record 



22 103.2 



23 No record 



24 102.0 



25 . . 102.2 



Result: Guinea-pig 36 did not develop typhus during an 

 incubation period of thirty-eight days, after inoculation with 

 the viscera of louse 1 of Box xxxiv. After inoculation with 

 blood from a typhus patient, it failed also to develop typhus 

 during a further observation period of twenty-six days. 



