S24 



MATERNAL DYSTOKIA. 



this also, it appears, has been a source of difficulty and debate, from 

 neglecting to define terms. Saint-Cyr again has come to the rescue, 

 and his efforts to put the matter in a clear light must be looked on as 

 eminently satisfactory. 



Glancing at Fig. 88, we see two pieces of cord, the strands of which 

 exactly, but more clearly, represent the spiral plicaB of the twisted 

 vagina or cervix uteri. It will be observed from the course of the 

 strands, that the pieces are twined in opposite directions : cord A being 





Fig. 91. 



Right Uterine Torsion : 

 Manipulation. 



Fig. 92. 



Left Uterine Torsion 

 Manipulation. 



twined to the right, and cord B to the left. This disposition of the 

 strands of a rope being generally recognised as exact in the technical 

 language of mechanics, as well as in speaking of the spiral inclination 

 of the thread of a screw, the same application of the terms should hold 

 good in such a mechanical deviation of the uterus as that now under 

 consideration. 



These different torsions can be imitated by the handkerchief, as has 

 just been pointed out ; and they are well represented in Figs. 86 (left 

 torsion), 89 (left torsion), 90 (right multiple torsion), and 93 (left tor- 

 sion), which illustrate simple and multiple, as well as right and left 

 torsion. 



