﻿238 STRONG. 



Combined table comparing efficiency of different methods of immunization. 



KILLED PEST CULTURES. 



"MAASSEN ALT"— Continued. 



Kind of animal and 

 series No. 



•6 



3 

 o 

 o 



a 



G> 



£ 

 s 



S3 



%s 



O >■ 



■dS 



t, S 

 <u 2 



M 



S3 



Immu- 

 nized. 



Kind of animal and 

 series No. 



■a 



o 



3 

 o 

 c 



M 



a 



3 

 Z 



a> a) 

 ■° to 



r-i ° 



«| 



II 



sa 



3" 



S3 



Immu- 

 nized. 



u 



a 



3 

 25 



M 



C 

 a) 

 o 



Ph 



o 



a 



3 

 Z 



M 



3 

 o 



0) 



Monkeys (bouillon 

 cultures): 

 Series 5 . 



8 

 9 





3 

 2 



37 

 22 



Guinea pigs: 



Series 33 - . 



10 



7 



15 



15 



3 



1 

 1 

 1 



7 



4 



11 



14 



100 



66| 



78 

 100 



Series 38 __.. 



Series 40 __ _ 





Monkeys (agar cul- 

 tures) : 



Series 47 _ 



3 



[18] 

 20 

 15 









Total _ 



47 



6 



36 



88 





Series 23* 

 Series 25_ 



[3] 

 3 

 1 



mi 



4 

 4 



[72] 

 23 

 28 



EXTRACTS OF PLAGUE BACILLUS (FREE 

 RECEPTORS). 





Total 



Monkeys: 



4 

 5 





1 

 1 



25 

 20 



*55 



4 



13 



25 



Guinea. pigs (killed 

 agar cultures) : 

 Series 50 (total)__ 



15 





4 



26 



Series 26 



Total - - _ - 



9 



| 2 

 1 



22 







ARTIFICIAL AGGRESSIN. 



"PEST AVIRULENT." 



Monkeys: 



Series 29 (total) 



Guinea pigs: 



Series 29 



32 



4 



12^ 



Monkeys; 



Series 4 



6 

 5 

 8 

 10 

 15 





5 

 1 

 4 



5 

 8 



83 

 20 

 •50 

 50 

 53 



Series 11 



2 

 2 

 6 

 12 

 4 







 

 1 

 

 2 











16| 





 50 



Series 12 



Series 18- 



Series 30- 



Series 51 



Series31 



Total 



Series 36 



44 





23 



52 





Guinea pigs: 



Series 32 



11 

 9 



15 

 21 

 15 



5 

 2 



5 



6 



8 



15 



12 



83 

 85 

 53 

 71 

 80 



Total _ _ 



26 



H 



11 



Series 37 



NATURAL AGGRESSIN. 



Series 39 



Series 46 



Guinea pigs: 



Series 35 



15 

 12 





4 

 4 



26 

 33± 



Total 



71 



7 



46 



72 



Series 44 







Total 



"MAASSEN ALT." 



27 





8 



30 





Monkeys: 



4 

 12 

 18 

 15 



4 

 1 



3 

 8 

 13 

 7 



75 

 66§ 

 92 

 . 50- 



KLEIN'S METHOD. 



Series 21 _ ___ 



Guinea pigs: 

 Series 54 . . 

 Series 56 __ . 



6 



7 





2 

 2 



33± 

 28 



Series 24. 



Series 52 



Total .__ 



i Total _ 



49 



5 



31 



70 



13 





4 



30 





* Series 23 has not been considered in the total. See text. 



