No. 7. 



DEPARTMENT OP AGRICULTURE. 



93 



FIG. 7.— RED-AND-WHITE BULL, (16,014). 



1902. December 19. 0.1 c.c. tuberculin; reaction. 



1903. February 2. 0.8 c.c. tuberculin; reaction to 105.6° 

 1903. May 4. Died. 



F. 



Right bronchial gland. 



Fig. 



Left bronchial gland. 

 Mediastinal glands. 



Necropsy : Weight 430 pounds. This bull died suddenly, appa- 

 rently of acute indigestion. The only evidence of tuberculosis in this 

 animal consisted in the presence of several caseous nodules in both 

 bronchial and in the mediastinal lymphatic glands. 



FIG. 8.— RED-AND-WHITE HEIFER (16,016). 



1902. December 19. 0.1 c.c. tuberculin; reaction. 



1903. February 2. 0.8 c.c. tuberculin; reaction to 106.0° F. 



1904. September 17. Killed. 



Fjg. 8. 



Left lung* 

 Mediastinal gland. 



Necropsy : Weight 578 pounds ; poor condition. In the left lung 

 at the bottom of the posterior lobe there is an area containing nu- 

 merous tubercles, some of which have undergone caseation. Two sim- 

 ilar areas are found in the tip of the lung. The surrounding lung 

 tissue is red and dense and is infiltrated with small gray tubercles 

 of pinhead size, some of which have cheesy centres. The posterior 

 mediastinal gland is five inches long and two inches in diameter. 

 Tliis gland is filled with dense nodules, most of which have under- 

 gone caseation, and some of which contain calcareous deposits. 

 Guinea-pigs inoculated with infiltrated lung tissue developed tubercu- 

 losis. 



FIG. 9.— RED-AND-WHITE HEIFER (16,018.) 



1902. December 19. 0.1 c.c. tuberculin; reaction. 



1903. February 2. 0.8 c.c. tuberculin: reaction to 106.4° F. 



1904. September 19. Killed. 



% '^ 



Ritrbt liinsr 

 Bronchial gland 

 Mediastinal gla 



Pig 9. 



Left lung. 



