lO THE SHOEING OF HORSES. 



seen to perform a similar service to the elastic cushion — thus 

 affording to the joint a double protection. It may also be observed 

 that the paring of the horny frog (7) tends to the injury of the 

 navicular joint. The frog should not be pared. It may also be 

 further seen upon reflection, that the horny sole (6) should be 

 pared no more than is absolutely necessary. It is generally neces- 

 sary to remove some portion of the sole. In strong, vigorous 

 feet the sole, is produced with great rapidity ; and if left alone, 

 as in unshod feet, it will naturally exfoliate in flakes ; but if these 

 flakes are loose upon the sole, as they frequently are upon feet 

 that are shod, they should be removed. It is impossible to nail 

 a shoe securely to the foot if the flakes are left upon the sole. 



20. A strip, coloured green, descending from the coronary 

 frog band to the termination of the hoof: this green strip is to 

 represent the epithelial scales covering ^the outer surface of the 

 wall. (See Plate II., Figs, i and 3.) 



14, 15, 17. Parts coloured yellow, to represent the tendons 

 which pass from above to the bones of the foot, where they 

 become inserted. The reader is especially requested to note the 

 curve of the tendon 15 as it passes under the navicular bone 16. 



