158 Scientific Proceedings (84). 



table 1. 



Des. 1. 



Des. 2. 



Des. 3. 



Des. 4. 



Des. 5. 



Des. 6. 



1 1** 



19 





28 



15 



15** 



13** died 



40 



19 died 



29 



28 



30** 



15 



69 



24 



30 



29 



31** 



16 



71 



25 



32 



32 



32** 



29 





28 



33 



33 



33** 



30 





29** 



34 



34 



40 



50 





30 



40** 



54 



54** 



68 





3i 



46 



55 



55** 



83 





32** 



54 



65** 



65** 



84 





33** 



55** 



67 



67** 



85 





34** 



65 



68* 



68** 



87 





40** 



67 



<^o*** 



70 



89 





41 



68 



72** 



72 







43 



70 



75 



75 







45 



72 



76 



77 







46 



75 



77 



79 









76 



78 



80** 







55*** 



77 



79 



81** 







65** 



78 



80 



82** 







67 



79 



81 



83** 







68 



80 



82** 



86** 







70 



81 





88** 







72 



82 





89 







73 



84 





90 







74 



85 





91 







80 



86 





96 







81 



87 





97 







87 



88 

 89 





98 

 99 

 100 



The same chicken, or different ones, had meanwhile been 

 treated with serum, which had been attenuated in bone marrow 

 growing in a plasma medium (Table II). 



TABLE II. 



Chickens Treated with Serum Attenuated in Bone Marrow. 



Ser. B. 



Ser. C 



Ser. I. 



Ser. M. 



Ser. N. 



Ser. O. 



Ser. T. 



Ser. V. 



Ser. Hi. 



I died 



31 



3<J 



3 a** 



31 



9 



30 





28 



2 died 



4 



4** 



4 



4 



10 died 



4 





29 



3 died 



5 died 



6 died 



7** 



7 died 





3 





30 









8 



8 







17** died 



31 







8 











18 



32 

















19 



33 



















34 



















40 



















54 



















55 



















65 



















68 



Also during this time, the same or different chickens were 



