VETERINART DENTAL SURGERT. 219 



thickened. The weight of the bones was greatly 

 increased owing to the amount of fluids present, but 

 when allowed to dry they became extremely light 

 and if their surfaces were not interfered with pre- 

 sented a furry appearance, steel grayish in color, 

 which would if the ringer was drawn lightly across 

 it receive an impression like that made upon plush. 

 I did not further examine these specimens but am 

 satisfied from their condition that animal matter 

 existed in preponderance; which is self evident, and 

 not inorganic material as our writers ascribed. 



It is not a disease of growth as is thought, for in 

 my observations I find it affecting the equus family 

 under all circumstances, without regard to age, sex 

 or habits of life. We also find its subjects both 

 plethoric and anaemic. Plethora existing only in 

 that form in which the facial enlargements develop 

 rapidly. I have never known other animals to be- 

 come its victim, but one of our writers however, 

 describes it in sheep. The horse seems to become 

 attacked most often while the mule is rarely affected, 

 even in that country where the disease is most prev- 

 alent and they are used almost exclusively. 



CAUSES. 



It has been attributed to various causes, and 

 among them to errors of diet. G. H. Dadd now 

 deceased, who was formerly of Chicago, Illinois, 

 and who evidently gave the matter a great deal of 



