RKTROllRKSSIVlC TISSl'E l' 1 1 A N( IKS. 



239 



the appearance of calculi. Hair balls incrnstcd with mineral 

 salts taken from the deer by someone's grandfather or great- 

 grandfather is the ordinary "mad-stone" in use at the present 

 time. Recently a hair ball (bristles) completely filling the stom- 

 ach was obtained from a hog slaughtered in a packing house. 

 Hair balls are usually found in the abomasum or large intestines 

 of the ox and in the stomach or large intestine of the hog. The 

 presence of a hair ball produces the same effects that would be 

 produced bv any nther indigestible bndv of the same size in the 

 same location. 



Fecal Concrements. — The intestinal contents may accumulate 

 into compact masses. These concrements interfere with the 



Fig. 1-7. — Hair Balls. 



(Egagaropiles. ) 



