PROTOCOLS OF EXPERIMENTS 99 



June 15 102.0 June 22 No record 



16 No record a 23 102.0 



a 17 No record u 24 No record 



" 18 102.7 u 25 102.5 



" 19 102.4 26 No record 



" 20 No record 27 102.7 



" 21 101.8 



On June 28th this guinea-pig was inoculated with 5 c.c. of 

 blood from patient 814 (eighth day of typhus). The subse- 

 quent temperatures were as follows: 



June 28 102.0 July 12 102.0 



29 No record 



30 102.6 



July 1 101.7 



2 No record 



3 105.3 



4 103.0 



5 102.5 



6 No record 



7 . . 102.1 



101.5 



9 No record 



10 101.8 



11 . . 102.0 



13 102.6 



14 103.4 



15 No record 



16 103.4 



17 103.6 



18 103.4 



19 103.4 



20 103.6 



21 No record 



22 103.6 



23 103.2 



24 102.9 



25 102.6 



There is no record of an autopsy. 



Result: Guinea-pig 41, following inoculation with the viscera 

 of louse 1 of Box xxxvn, during an observation period of 

 thirty-four days, did not develop typhus. Sixteen days after 

 the inoculation with blood from a typhus patient it developed 

 moderately high temperatures lasting ten days. The coinci- 

 dence of the temperature elevation with that of other guinea- 

 pigs injected with the blood of patient 814 on June 28th 

 strengthens the evidence that typhus followed the blood 

 injection. 



Conclusion: Louse 1 of Box xxxvn did not contain the 

 virus of typhus. 



