334 Dr. R. T. Hewlett. The Effect of the Injection of [June 5, 







RABBIT XVM 







RABBIT 



XVIII 





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Chart VII. — Old Staphylococcus Endotoxin Solutions (7 weeks old). 



Eabbit XVII received TO milligramme Staphylococcus endotoxin, old strain. 

 Rabbit XVIII received l'O milligramme Staphylococcus endotoxin, new strain. 



Index 

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Chart VIII. — Old Staphylococcus Endotoxin Solution (8 months old). (Prepared from 

 new strain of Staphylococcus.) Rabbit XIX received O'l milligramme endotoxin. 



considered desirable to attempt to ascertain whether the endotoxin 

 produces a negative phase comparable to that produced by a vaccine. For 

 this purpose relatively large doses of staphylococcus vaccine (15,000 x 10 6 

 cocci = 1*5 c.c. vaccine), and of fresh staphylococcus endotoxin (1 milli- 



