404 DOUBLE-THONG CH. XVII 



the double-thong should, if possible, get some one 

 to teach him ; it is extremely difficult to do it from 

 a description ; but the mechanism of it is as fol- 

 lows : — 



If the whip is held in the right hand, pointing 

 slightly upward and to the front, and moved sharply 

 to the right and a little upward, with the thong loose, 



Fig. 165. 



the thong will turn over the stick, and 

 slipping along it over the top, will come 

 to rest in its original position, having 

 gone over the stick from left to right. 



If, however, the point of the thong is held against 

 the collar of the stick by the thumb, and the opera- 

 tion repeated, the point not being free to run out, but 

 being suddenly arrested, the bight of the thong will 

 swing- back to the left and will wind itself round 

 the stick from right to left, the upper turns being in 

 the direction of a right-handed screw and the lower 

 turns in that of a left-handed screw (Fig. 166, A). 

 Since the upper part of the thong has made a turn 

 over the stick, there will be one more turn in the 

 right-handed part than in that near the hand. If 

 these lower turns are pulled out, leaving only the 

 upper turns, the thong will lie as shown at B, 

 Fig. 166. 





