No. 636] GUINEA PIGS AND TUBERCULOSIS 



The cultures used were of the human type of tuber- 

 culosis with the exception of lot 3 in which the type was 

 bovine. 



TABLE I 



1 1 1 



1 I 



h 



r 











June 2, 1919 



1/10 n.g. culture 07.8 intrap... 







4 June 4 1 

 7 lluly 17 



July 3.' " 



1/5 II 405 

 1/5 " DO 







8 1" 30 j 











10 1 " ' 28 Oct. 24 " 













~, 























the 



same clay. The results are so similar, in spite of the 

 ditit'erences in the age and weight of the animals, that 

 they can be dealt with satisfactorily as one experiment. 

 Lots 10 to 14 were all given the same inoculation on Oc- 

 tober 24 and 25 and can also be dealt with as one experi- 

 ment. The same quantity of the culture, inoculated 

 intraperitoneally in lots 7 to 9, was inoculated subcu- 

 taneously in lots 10 to 14, with the consequence that the 

 average length of life was much greater in the latter 

 group of lots. Lots 3, 4, and 5 were inoculated separately 

 with different cultures or different amounts of the same 

 culture. The numbers in each case are rather small for 

 separate treatment. The mortality curves for lots 4 and 

 5 are not, however, very different. That for lot 3 can be 

 made similar by multiplying the days of survival after 

 inoculation by .'I ."). These' three lots hnvo been combined 

 in this way foi' L'()nii)aris<ni with the lati-r and more satis- 



