166 



we shall postpone a part of the details to the sec- 

 tions in which that subject is treated. 



In retrogression both the anterior and posterior 

 lines were separately formed, but if one line be 

 forced and the other form by induction, then, from 

 the continuance of this forcing, we shall have as 

 the result, equalization of gathering on the two> 

 sides, and thus a position from which any gait may 

 be initiated by a redistribution of the tractions. 



Any portion in the course of the icinding line may he 

 selected for commencing the forcing, and the equalization 

 will then hegin at the point ivhich would have been 

 formed by that moment of action in the original 

 formation of the line. 



We shall, however, for the present, consider the 

 forcing as beginning in each S, at a point of ap- 

 plication. 



When a horse lands from any spring, he may be 

 halted in three ivays."^ First on the alternate an- 

 terior line of the ophidian spine — this line having 

 being brought into superadded action by the 

 pressure of the legs or by the spur, while the bit 

 checks the extension of the line to a^ in the neck S 

 until this is formed as part of the adjustment in 

 equalizing the sides from forcing its ophidian 

 portion. In this case the horse will be halted on 



