

Figure ?. SaImon3!la pullorum, the Causative Orginism of Pullorum Disease. 

 Cells in a smear prepared frcm a 40-hour agar culture. X 1200. Refer to question 3. 





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^ 



Figure 4. Ovaries Removed from Hens. Specimens I and III, showing irregular-shaped, 

 discolored, and pedunculated ova, are affected with pullorum disease. Specimen II, showing 

 normal ova, is not affected. Refer to question 4. 



(10) 



