Record of the Tracks on the Ground 85 



line. Again remembering the simple definition or corollary of algebra, 

 The sum of two quantities, the one positive and the other nega- 



viz 



tive, is the numerical difference with the sign of the greater prefixed ;" 

 we have +8.25 inches for the total and +0.825 inches for the average 

 lateral extension to the left on the part of near hind. In the same 

 manner, as given in Fig. 62, we obtain off hind as being -{-0.15 inches 

 on its natural side, or to right side of median line. The near fore 



* * ' 



FIG. 63 



being altogether on left, or its positive side of median line, we get the 

 average of 3.57 inches on near side ; and for the off fore we again 

 have a total on its right or positive side of 11.75 inches and a total on 

 its left or negative side of 7 inches, which added as above gives us 

 -{-4.75 inches for total result, or +0.475 inches for the average lateral 

 extension to its right or positive side. 



With the totals of the angles of pointing in or out, the same cal- 

 culations can be made, and we have the toeing in of both hind abso- 



