192 



SCIENTIFIC HORSESHOEIXG. 



Fig. 86. coffin bone — vertical in- 

 line. 



Fig. 86 is a photograph of a perfect 

 coffin bone, exactly level on sole 

 bearing, with the flexor tendon cut 

 oflf" even with B, the navicular bone. 

 In a well-balanced foot the vertical 

 dropped from the center of the knee 

 passes through the center of the apex 

 of the coffin bone. 



Fl<^. 87. COFFIN HONE — VERTICAL OUT 

 OK LINE. 



Fig. 87 is a photograph of a perfect 

 coffin bone, showing tiie efTects of an 

 uneven height of quarters. Assum- 

 ing width of hoof 4 inches on the 

 bottom, distance from base to knee 

 20 inches, difference of height in 

 quarters of ^ inch would cause a dis- 

 placement of n inches at the knee, 

 thus unevenly distributing the weight 

 and bearings. 



tendons and ligaments will operate in structural har- 

 mony. 



We are now prepared to advance to the consideration of 

 the foot and leg in their proper positions as weight bearers. 



Fig. 88 has been drawn with great care to show the perfect 

 front limb and foot. It is correctly placed under the carcass, so 



