192 JUDGING JACKS, JENNETS, AND MULES 



very much, it being believed by some that one is the de- 

 scendant of the other. The breed is too small for using on 

 jennets, although very desirable for the production of small 

 mules. The small size of the breed and, therefore, a limited 

 demand for them, has been responsible for the discontinuance 

 of their importation. 



American. The American or Mammoth jack is a distinc- 

 tive breed which is a derivative of the several breeds of jacks, 

 principally the Catalonian, imported into this country at an 

 early date. The breed is distinctly American and was not 



FIG. 79. An American or Mammoth jack with weight, style, and quality 

 (Courtesy Kentucky Agricultural Experiment Station.) 



pedigreed by a systematic plan until 1892. A registry asso- 

 ciation American Jack Stock Stud Book was established 

 in 1888. Up to the former date jacks which did not attain 

 a height of 14-2 hands and jennets 14 hands were not eligible 

 to registry. After this date jacks and jennets to be eligible 

 to registration were required to be 15-2 hands and 15 hands 

 respectively, unless produced from recorded ancestry. In 



