CASTING AND SECUKING HARNESS AND ROPES. Ill 



Figure 129 represents the slip knot or loop. This loop is 

 very extensively used in restraint work. So long as traction 

 is made on the free end of this loop there is no liability of its 

 slipping. Besides the above, there are ring knots, stopping 

 knots, surgeon's knot, etc. 



Hock Twitch. 



After the animal is cast and restrained by most of the cast- 

 ing harness and rope methods it oftentimes becomes necessary 



to supplement this restraint by 

 applying the hock twitch. Fig- 

 ure 130. This twitch consists 

 of a heavy rope with a loop in 

 each end to carry the stick by 

 which the twitch rope is tight^ 

 ened around the leg. This ap- 

 pliance limits the leg move- 

 The hock twitch is apj^lied about 4 inches above the 



Hock Twitch. 



ment. 

 hock. 



Figure 131 represents Petersen's hock 

 joint flexing and fixing apparatus for 

 bending and holding the hind leg in the 

 flexed position. This apparatus consists 

 of two heavy leather straps attached to a 

 specially designed metal center piece. The 

 metal is placed against and in the flexure 

 of the hock. One of the straps is attached 

 around the leg above the hock and the 

 other below the hock. 



Figure 132 illustrates one of Dollar's 

 modes of fixing the fore and hind legs 



together after an animal is cast. 



Fig. 131. Petersen's 

 Hock Joint Flexing 

 and Fixing Appa- 

 ratus. 



Knee Straps. 



In order to properly throw an animal with casting harness 

 it often becomes necessary to first restrain one fore leg by using 

 some form of knee strap. Sometimes, or with some forms of 

 casting apparatus, it becomes necessary after casting to apply 



