PROTOCOLS OF EXPERIMENTS 



107 



F. 



June 28 102.4 



" 29 No record 



" 30 102.5 



July 1 102.6 



" 2 No record 



3 104.3 



4 103.2 



5 103.4 



6 No record 



7 102.3 



8 101.4 



9 No record 



10 102.6 



11 . . 102.3 



op 



July 12 101.6 



13 102.4 



14 103.1 



15 ! . . . . No record 



16 102.4 



17 102.1 



18 102.2 



19 103.0 



20 102.4 



21 No record 



22 102.1 



23 101.7 



24 102.6 



25 . . 102.0 



Result: Guinea-pig 47, inoculated with the viscera of 

 rickettsia-infected louse 3 of Box xxxvm, developed typhus 

 after an incubation period of ten to thirteen days. 



It failed to react after inoculation on June 28th with human 

 typhus blood known to be infectious, during an observation 

 period of twenty-eight days. 



Conclusion: Rickettsia-infected louse 3 of Box xxxvm con- 

 tained the virus of typhus. 



Record of Guinea-pig 48, inoculated with rickettsia-infected 

 louse 4 of Box XXXVIII 



Temperatures following the inoculation on May 24th : 



F. op. 



May 24 102.2 



June 11 . . 102.2 



12 102.0 



13 102.8 



14 103.0 



15 102.6 



16 No record 



17 No record 



18 102.6 



19 102.7 



20 No record 



21 103.0 



22 No record 



23 102.7 



24 No record 



25 102.4 



26 No record 



27 . . 102.6 



