179 

 PAET V. 



SETTING-UP. 



Before rehearsing the chief points which are 

 concerned in " setting-up," we will allude to some 

 general principles. 



It will be noticed that the alternate head ball 

 motion, in gathering the alternate anterior line, 

 coincides in direction with the old motion of the 

 underlying socket, m gathering the old posterior 

 line. Now this alternate ball motion absorbs the 

 old socket gathering, and thus transforms it into 

 the alternate anterior gathering, at the same time 

 that it releases the old anterior gathering, which 

 was held under control by the now transferred and 

 metamorphosed posterior winding line. 



We say " metamorphosed luinding line " because 

 the same thing takes place at all the articulations, 

 and thus the (for instance) right posterior winding 

 line becomes the right anterior winding line, the 

 concave to the right of the lower C ascending to 

 the upper C, and vice versa. 



The head joint changes its relations, in which 

 the ball represents the anterior, the socket the 

 posterior line by a concentrated working, the other 

 joints do so by an eccentric movement which gives 



