List of Illustrations. 



Fig. I 



Fig. 1 8. 



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

 after Moore) S4 



Breast bone of a fowl showing excessive emaciation 



in tuberculosis. (After Ward) 6o 



Liver of fowl affected with tuberculosis. (After 



Ward) 6i 



Spleen from tuberculous fowl cut through the middle. 



(After Koch and Rabinowitsch) 6l 



Intestine and mesenteries of a fowl affected with tuber- 

 culosis. (After Ward) 62 



Drepanidotaenia infundibuliformis, 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) 8s 



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 



Head of a fowl 22 days after inoculation with a culture 



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



