PLATE VII 



FIG. 



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FIG. 2 



Survival and Virulence of Poliomyelitic Microorganism. 

 (Flexner, Noguehi, and Amoss.) 



FIG. 1. Sediment showing the minute microorganisms after three days' growth in mixed 

 ascitic fluid and bouillon in a flask employed for mass cultivation. Giemsa stain. X 1000. 



FIG. 2. Spinal cord showing meningea! cellular infiltration extending into the anterior 

 median fissure. X 1000. 



