180 



an epicycloidal sliape to tlieir curves of transform- 

 ation. 



At the cross-lines the same movement has place, 

 the direction in which the old (for example) right 

 posterior line turns its posterior cross-line end 

 is the same in which the alternate right anterior 

 line will turn its anterior end, and they will both 

 draw their ends over to the same (here the right) 

 side, where the joint will slip, the remaining alter- 

 nate line claim its traction, and the workings again 

 become diagonal. 



It is the rectifying of the cross-line, and that, 

 finally, between the Inng-lobes, which is, as it may 

 be expressed, the sticking point in " setting-up." 



§ 160. In man as has been mentioned, there is 

 one more gathering than in the horse, viz.: that 

 which brings the bearings of all the tractions above 

 the collar bones, and unites the results of all the 

 S S in the hands. 



With this addition, which is only an extension 

 of those turns at the upper comer of the sternum 

 that unite the rear C C of the central and third 

 S S together in the neck, the principles of motion 

 in man are precisely similar to those in quadru- 

 peds, and we may refer to the foregoing discussions, 

 for every explanation that may be required. 



