150 



ELEMENTARY OPERATIONS. 



Some needles are armed and protected witli bandies, as those 

 of Trelat, of Eiverdin, and of SimjDSon. Sometimes tlieir lanceo- 

 lated jDart has the eye pierced in its center ; in others, the eye is 

 merely a notch, closed by a repulsor, moved by sHding through 

 the handle. Generally, the hand is sufficient to push the needle 

 through the skin, but at times, as has been mentioned, forceps or 

 needle-holders are necessary, such as the needle-holder of Mat- 

 thieu, an ordinary forceps or an ordinary pin-holder. The com- 

 mon "vrire dressing pin is also included among sutui'e implements, 



