DYSTOKIA FROM MALPRESENTATION OF FCETUS. 435 



on the fcetus at the same time as his own — both arms being in the genital 

 canal ; while Schaack gets his assistant to seize his right arm with one of 

 his hands, resting the other on his left shoulder, and pushing him for- 

 ward — Schaack's right arm and hand in this way playing the part of the 

 crutch. 



Solid Repeller, with 

 A Movable Spike. 



Fig. 107. 



Si.MPLE- Jointed 

 Repeller. 



Fig. io8. 



Jointed Repeller: 

 Open. 



Fig. 109. 



Jointed Repeller: 

 Closed. 



In order to propel the head, Binz invented an instrument like a gob- 

 let, furnished with a long handle ; the hollow portion fitted on the muzzle 

 of the foetus, and the head could then be pushed forward. Solid rods to 



1 



