CHAP. V.] CANKER — HOW PREVENTED. 525 



alone depends the cure, and such a cure as shall 

 prevent a relapse. Of course, he will not fail to 

 take care of the evacuations, as in case of f rush; 

 nor that the earliest exercise the animal takes be 

 proportioned to the amount of disease he has un- 

 dergone in an inverse ratio. 



Prevention. — As we have seen that 'inflammation 

 is the immediate cause of all disorders of this class, 

 and seeing that the irritation which produces this 

 has been brought on by distress of the parts for 

 want of due pressure on the frog, any one whose 

 eyes are open may see the necessity of paring down 

 the heels so that the frog may have a bearing, 

 whenever the horse is walked over field or turf, for 

 example. For hereby it will be seen, on turning 

 to the brief description we thought proper to give 

 at the beginning of this Booh, pages 443 to 451,. 

 of the internal conformation of the foot, that the 

 healthy action of the parts upon each other is only 

 to be kept up by the pressure of the sensible frog 

 upon the juices, that abound to redundancy at the 

 shuttle bone, so that these may be dispersed for 

 the general resuscitation of the whole foot, and to 

 make up the losses it sustains by wear and tear. 



" When the frog is not sufficiently pressed upon, 

 (says Mr. Coleman), it becomes soft from the accumu- 

 lation of the fluid which it naturally secretes in great 

 abundance from the fatty [elastic] substance, which 

 lies immediately under the tendon." This view of 

 the process tallies tolerably well with our own ex- 

 amination of the subject, at the pages just referred 



