MANUAL OF PACK TRANSPORTATION. 



225 



The packs are practically identical in all details, except the design 

 of the hangers, these being especially adapted to the loads they are 

 to carry. 



APAREJO, PROPER. 



The aparejo, proper, includes the body, crupper, sobre-jalma, cincha, 

 and corona. 



THE PACK FRAME. 



The frame is identical for all packs. It consists of two bronze 

 arches connected longitudinally by steel angles. To the projecting 

 ends of the arches are riveted four steel hoops or ribs, which hang 

 downward and partly embrace the body of the animal. The frame- 

 work thus formed is strengthened by four steel plates riveted fore and 



75927°— 17 15 



