328 



BUILDINGS, SANITATION, AND DISEASES 



Courtesy Tennessee Department of Agriculture. 



FIG. 90. Ulcers (large intestine), chronic form. 



Courtesy Tennessee Department of Agriculture. 



FIG. 91. "Button ulcers" (large intestine), chronic form. 



Courtesy Tennessee Department of Agriculture. 



FIG. 92. Group of cholera pigs. 



