63 



the "bearers." The "propellers" rest on their 

 outer, the " bearers" on their inner bevels. 



Corresponding with fa'), the drawing on the 

 anterior ends of the cross lines, which takes effect 

 chiefly in the jirimary section of the anterior winding 

 line (§ 25). This produces an increased bearing of 

 the propellers on their outer bevels and, to some 

 extent a turning outward of the bearers. 



(Jorrespondiyig with ih'), the check which would 

 be given to the rear points of the cross-lines, in 

 following the anterior points is, by the strong work- 

 ing in the primary section of the posterior winding 

 line — the rear points being prevented fi'om moving 

 (§ 32) — received at the head. It brings the pro- 

 pellers on to their inner bevels, double twisting 

 them — first those of the rear C C, by action pro- 

 perly belonging to h, then those of the anterior C C, 

 by action of the secondary section ; and this 

 through the S S in succession, from rear to front. 

 So far as it influences the bearers it turns them 

 outward. 



Corresponding ivith (h), the full formation of the 

 primary section of the posterior winding line, as the 

 rear ends of the cross-lines come into place ; the 

 turning outward of the bearers and complete 



