182 



The lung exercises will afford tlie best clew for 

 those who, from want of anatomical knowledge, or 

 from the want of clearness in our own explana- 

 tions, may ftnd difficulties with the other methods. 

 In addition to these advantages it is, perhaps, 

 safest always first to fill up the lungs in any ex- 

 ercises which involve lifting, or give a strain to 

 •one particular part of the body. 



§ 161. The movements of setting-up are not so 

 comphcated as they might seem, since the con- 

 tinuance of the initiatory motion entails all the 

 others, and the chief difficulty is rather to know 

 what directions of movement are to be permitted, 

 than what ones are to be made. 



§ 162. It may, however, be as well here to re- 

 capitulate the leading points assumed for locomo- 

 tion and for halting. 



First, — The winding-Hnes act for each S in two 

 sections. The beginning and ending of each line 

 are collateral, so that the " point of application " 

 of an anterior " winding-line " is identical with the 

 ending of its collateral posterior "winding-line," 

 and the point of application of a posterior line is 

 identical with the ending of its collateral anterior 

 line. The anterior lines develope, at first, spe- 

 'Cially in their secondary or posterior sections. 



