A STUDY OF THE SKIN TUMORS OF HORSES AND 

 MULES IN ALABAMA.* 



—BY — 



It is my endeavor to give the results of my investigations 

 of the common skin tumors which are so frequently found 

 upon horses and mules that are brought to the free clinics 

 for treatment. 



I have made no new discoveries as to the origin and 

 cause of these tumors, nor do I desire to advance any new 

 theories as to their origin; but, by the advice of Dr. Gary 

 who has kindly furnished me with the material for the 

 study, I have attempted (by collecting several of these 

 tumors from different animals, and studying them indi- 

 vidually and collectively with special reference to their 

 history and their macroscopical and microscopical appear- 

 ances) to place them under their proper classification. In 

 the first place, as their name indicates, they are tumors ; 

 that is, they are neoplasms or pathological growths of an 

 embryonal character, developing without inflammation. 

 This variety of tumor is almost painless ; it is, of course, 

 not entirely devoid of sensation ; it may be more sensa- 

 tive than normal skin ; yet, when compared with most 

 sacomas and carcinomas, it may be called painless. These 

 neoplastic growths are tumor-like in their origin; that is, 

 they originate without any apparent cause — somewhat 

 spontaneously. We do not know why or how they orig- 



* Mr. S. L. Coleman was a post-graduate (1895-96) in the A., and M. 

 College at Auburn, Ala , and worked up this bulletin as a thesis for a 

 post-graduate degree while studying histology, pathology and bacte- 

 riology in the Veterinary Department. — C. A. C. 



