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points of the skeleton being in such positions that 

 the muscular actions play on them in certain ways. 

 Thus, if the point where the anterior end of the 

 cross-line for the right anterior winding Une should 

 be brought to a certain position in relation to the 

 right anterior point of application, the preliminary 

 form of the primary section of that Hne will be 

 formed, and so on. 



The first effect of forcing the left anterior point of 

 apphcation will be the passing over of a portion 

 of the gathering from the secondary section of 

 the left anterior winding Hne to what will be the 

 course of the right anterior hne. This transfer 

 will begin, Jirst, by the formation of a certain 

 amount of convexity to the right, at the posterior 

 end of the rear C, i. e., allowing of the passage 

 without a spriyig of a certain amount of the left 

 side gathering. 



Second. The forcing of the movement (a ' ) will, at 

 the same time, bring back the anterior cross-line 

 end of the left anterior winding line to the centre 

 and advanced to the front, and also cause the ad- 

 justment of the point, on the left side of the spine, 

 which should serve as anterior cross-hne end for 

 the right anterior point of apphcation, so that it 

 shall come into a similar position. 



