List of Illustrations. 



Showing condition of liver in "blackhead." (Modified page 

 after Moore) 54 



Breast bone of a fowl showing excessive emaciation 



in tuberculosis. (After Ward) 60 



Liver of fowl affected with tuberculosis. (After 



Ward) , 61 



Spleen from tuberculous fowl cut through the middle. 



(After Koch and Rabinowitsch) 61 



Intestine and mesenteries of a fowl affected with tuber- 

 culosis. (After Ward) 62 



Drepanidotaenia infundihulif ormis , a tape worm of the 



fowl. {After Stiles) 77 



Intestine of a fowl turned wrong side out to show 

 tape worms in nodular fseniasis (After Pearson 

 and Warren) 78 



Sketch showing method of introducing turpentine di- 

 rectly into crop. (From Gage and Opperman) . . . . 80 



Worms protruding from a section of the intestine of 



a fowl. (After Bradshaw) 82 



Heterakis perspicillum, (From Salmon) 83 



Trematode worm or fluke showing internal structure. 



(From Thompson after Sommer) 84 



Lungs of a bird. After Salmon) '. . . 85 



Right lung of a goose. (After Owen) 85 



A lobule of the lung of a bird represented in ideal 



longitudinal section. (After Owen) 87 



Showing appearance of hen a day before death from 



roup. (From Harrison and Streit) 91 



Showing swelling of head in severe roup. (From 



Harrison and Streit) 92 



Head of a bird. The lower figure shows the maxillo- 

 ocular sinus, which opens into the socket of the eye 

 and communicates with the nasal cavities. The up- 

 per figure shows the roup tumor on the head caused 

 by the filling of this cavity with cheesy pus. (From 



Megnin) 93 



Fig. 18. Head of a fowl 22 days after inoculation with a culture 



of the roup bacillus. (From Harrison and Streit) 95 



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