JACKS AND JENNETS 191 



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 

 case of an imported jack, the minimum height standard 

 was set at 15 hands. 



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