CHAP. I.] SYMPTOMS OF: THE GALL DUCT. 281 



that poor animals alone acquire the yellowness 

 which gives name to this disorder ; though it must 

 be allowed that the same effect may be produced by 

 over-feeding and constipation, by swallowing hard 

 substances, or otherwise offending the said gut, or 

 the pylorus orifice of the stomach, as described at 

 pages 134, 137. The situation of this lower orifice 

 may also be seen depicted in the plate of a skeleton 

 at the intersection of K 26. At that page we did 

 not choose to speak of negatives, and, therefore, 

 omitted to notice the fact, that the bile or gall 

 secreted in the liver of this animal proceeds at 

 once, as soon as it is formed, into the gut, without 

 being detained in a sac, or gall bladder, as is the 

 case with all other animals, except deer ; so that r 

 upon any revulsion or hindrance to its free entry 

 to the bowels, the gall must necessarily return to 

 the numerous cavities thafpervade the whole liver, 

 and its reabsorption by the blood is no longer pro- 

 blematical. 



Symptoms. — A dusky yellowness of the eyes, 

 bars of the mouth, and tongue. The dung scanty 

 and pale, generally hard, and covered with slime ; 

 but in some few cases the horse scours ; that is, 

 when slight inflammation of the bowels also attacks 

 an ill-conditioned horse. The pulse is that of low 

 fever, and the same kind of drooping inactivity, 

 with loss of appetite, noticed under that head at 

 page 191 ; differing from it only in respect to the 

 seat of disorder, the low fever being general, or of 

 the whole system, jaundice of the circulation only. 



