164 



TEAGUE AND BARBER. 



Plague suspension on slides. 



(100,000,000 per cubic centimeter.) 



Time 

 exposed. 



Plate No. 1. 



Plate No. 2. 





Colonies. 





At once. 



8,000 



Positive. 



Min. 







1 



1,000 



Positive. 



2 



100 



Positive. 



5 







Negative. 



10 







Negative. 



15 







Negative. 



21 







Negative. 



30 







Negative. 



Prodigiosus suspension on slides. 



(273,000,000 per cubic centimeter.) 



Time 

 exposed. 



Plate No. 1. 



Plate No. 2. 





Colonies. 





At once. 



1,000 



Positive. 



Hrs. min. 







15 



6 



Positive. 



30 







Positive. 



45 











1 00 



1 







1 30 











2 00 











2 30 











3 00 











3 30 











4 00 











4 30 











Sarcina suspension on slides. 



(3,000,000 per cubic centimeter.) 



Time 

 exposed. 



Plate No. 1. 



Plate No. 2. 





Colonies. 





At once. 



1.000 



Positive. 



Hours. 







1 



800 



Positive. 



2 



400 



Positive. 



3 



175 



Positive. 



4 



17 



Positive. 



5 



33 



Positive. 



6 







1 colony. 



20 







Negative. 



