1 68 Gait of the American Trotter and Pacer 



ence in height. We have, therefore, the proportions between elevations 

 of hock and knee action, as follows: 



Subject Hock Joint (proportions) Knee Joint 



1. Elaine 12 (.86) 14 



2. Occident n (-73) 15 



3. Edgington 11.5 (.82) 14 



4. Clay ii, (.85) 13 



Average 11.4 (.81) 14 



To get the hock action itself and compare it with the knee action 

 we must reduce the former to the same base line or reduce the ele- 

 vations of hock joint 20 per cent. Hence we have: 



Subject Hock Action (proportion) Knee Action 



1. Elaine 9.6 (-685) 14 



2. Occident 8.8 (-585) 15 



3. Edgington 9.2 (-655) 14 



4. Clay 8.8 (.675) 13 



Average 9.1 (.65) 14 



Therefore, while the apparent proportion of hock and knee action 

 is about 81 per cent, the actual proportion of the magnitude of hock 

 action to that of knee action results in but 65 per cent. Fig. 135 i) 

 will illustrate this to the eye. Recalling the curves of action as dis- 

 cussed in a previous chapter under Figs. 19 to 26 we can readily 

 understand these comparative elevations by studying the action of 

 the subjects in motion. In watching the hock action one is apt to 

 locate it in the point of the hock rather than in the joint proper, for 

 while it indicates as much, it does not give the real elevation. 



Elaine shows on the whole the most evenly divided action between 

 both extremities. Occident is an example of excessive knee action 

 and its influence on the lowering of hind action ; while Clay with 

 an indifferent knee action has a well developed hock action, causing 

 trouble, as we have seen in- Fig. 25, by probable interference. Abe 

 Edgington is nearest the average found and presents here a good 

 average trotter. Particular note should be made of the backward 



