272 Gait of the American Trotter and Pacer 



12.98 + 12.92 = I2>95 ft., and of the hind 13.05 + 12.98 = I3>OI ft 

 The general average for that part of the performance is 12.98 ft. 



With the thirteenth stride begins the mixed gait, the fore action 

 being short and high and the hind, action long and low. In fact, the 

 single-footing had the effect of decreasing the general average stride 

 of the whole trial to 12.90 feet approximately. 



Now, for the last eight strides we have the following averages of 

 the fore legs : 



near Fore off near Hind off 



12.71 12.55 13.07 12.85 



showing an average for the two fore of 12.63 ft- ( 12. 71 + 12. ssy an( ^ 

 for the two hind of 12.96 ft. (13.07 + 12.85^ t ne general average of 

 the fore and hind being approximately 12.80 ft. (-LI *:?), so that we 

 have a shorter average stride with lessened forward extension and in- 

 creased hind extension. Here we have a difference of extension of hind 

 over fore of 0.33 feet, or 3.96 inches. 



Averaging these two differences (0.06 feet for 12 strides, and 0.33 

 feet for 8 strides), we get about 0.17 feet as the average difference of 

 extension of the two hind over the two fore, or 0.085 ft- as tne actual 

 difference in extension between the front and hind extremities. This 

 same difference is visible in, the calculations of the distances of opposite 

 feet and of the diagonal or correlated feet. In the former we have 

 the totals as follows : 



Averages. 



Fore. Hind, 



o to n n to o o to n to o 



7-35 541 740 5-53 



H-i-94 4-1.87 



as shown in the extension of Fig. 201 ; that is, one-half of such differ- 

 ences constitutes the actual difference of extension of one foot over 



