XX. PREFACE. 



he was always led at exercise ; but he has so much improved 

 ill these respects, that he has changed places with his com- 

 panion, and for more, than a year, has been the favourite 

 riding horse. 



The Plates show the same foot at different times, and 

 under difterent circumstances. 



Fig, 1. The off fore foot of a horse seven years old, tahen in 

 June 1848 unth the foot on the ground, and the opposite 

 foot held up. 



Fig. 2. The same foot taken in September 1850 loith the foot 

 off the ground. 



Fig. 3. Tlie same foot taken on the same day loith the foot 

 on the ground, a7id the opposite foot held np. 



Fig. 4. shows Fig. 2. traced over Fig. 3. The inner line marks 

 the foot up ; and the outer line the foot down ; and the space 

 between them shows the amount of expansion. 



N. B. I have been tempted by the remarkable correspondence 

 in the minute irregularities of the outline on the outer side 

 of the foot in the two dravnngs to show the expansion on that 

 side, ivhich is incorrect, as regards the fact, for by mucli the 

 larger amount occurs on the inner side ; but, as it in no way 

 affects the proof, that the horse's foot does expand, I was un- 

 ivilling to forego the strong testimony this circumstance bears 

 to the accuracy, ivith which the drawings have been made. 



DixFiELD, Exeter. 



October 23»-rf, 1850. 



