LIST OF ILLUSTRATIONS 



1. Showing differences in constitutional vigor. (After H. R. Lewis) 5 



2. Silver-laced Wyandottes showing great constitutional vigor. 



(After D. S. Thompson) 7 



3. Curtain front poultry house, exterior. (Original) . . .11 



4. Curtain-front poultry house, interior. (Original) . . .13 



5. Crematory. (Original) 33 



6. Skeleton of cock. (After Dtirigen) 42 



7. Dissection of hen. (Original) 44 



8. Life history of a coccidium. (After Cole and Hadley) . . 73 



9. Showing condition of liver in blackhead. (After Moore) . 95 



10. Heart blood of pigeon infected with fowl cholera. (After Kolle 



andHetsch) 103 



11. Section of lung showing tubercle bacilli. ( After Himmelberger) 117 



12. Breastbone of fowl showing emaciation in tuberculosis. (After 



Ward) 121 



13. Liver of fowl affected with tuberculosis. (After Ward) . . 122 



14. Spleen from tuberculous fowl. (After Koch and Rabinowitsch) 122 



15. Tuberculosis of intestines and mesenteries. (After Van Es and 



Schalk) 123 



10. Intestines and mesenteries of a fowl infected with tuberculosis. 



(After Ward) 124 



17. Syringe used in tuberculin test. (After Van Es and Schalk) . 126 



18. Head of chicken showing positive tuberculin reaction. (After 



Van Es and Schalk) 127 



19. Drepanidotmnia itifundibnliformis, a tape worm of the fowl. 



(After Stiles) 1-^55 



20. Intestine of fowl showing tape worms in nodular tseniasis. 



(After Pearson and Warren) 138 



21. Sketch showing method of introducing turpentine directly into 



crop. (After Gage and Opperman) 140 



22. Worms protruding from intestine of fowl. (After Bradshaw) . 142 



23. Heterakis perspicillum. (After Salmon) 144 



ix 



