PROTOCOLS OF EXPERIMENTS 



95 



Experiments with Box XXXVI lice 



Between feedings the box was kept in an incubator at a 

 temperature varying from 20 to 30 C., usually 29 C. The 

 box contained 30 W lice (30 nymphs). 



From these lice the following preparations were made: 



Louse No. 



Smears 

 1 



Sections 

 1 



Result of Microscopical 

 Examination 



Rickettsia absent 



Rickettsia absent 



Result of Animal Inoculation 



Guinea-pig 40; Temp. 



Proved susceptible to blood from a 



typhus patient 



