12 INTRODUCTION. 



Two dissecting scalpels, one large and one small. 



Two dissecting forceps, one large with blunt ends, 

 and one small with fine points for more delicate work. 



Two pairs of scissors, one with large blades for 

 coarse work and one small pair for fine dissection. 



One seeker, an instrument of the form shown in II, 

 Fig. I. This will be found very useful in dissecting 

 nerves, blood-vessels, etc., when by careful tearing with 

 the seeker instead of cutting with the scalpel or scis- 

 sors structures may be revealed which otherwise would 

 be destroyed. 



Several weighted hooks of the kind shown in IV, 

 Fig. I. These consist simply of a strong hook to 

 which is attached a cord about two feet in length, car- 

 rying at its other end a lead weight. The most con- 

 venient weight to use is about 125 grammes, though 

 it is well to have some lighter and some heavier than 

 this. These weighted hooks are useful for holding 

 back the skin, muscles, etc., while dissecting, and are 

 much preferable to the ordinary chain-hooks sold with 

 dissecting cases. 



In addition to these instruments there should be at 

 hand for general use several artery-clamps or " serre- 

 fines," either of the form usually sold by instrument 

 makers, or preferably like that shown in V, Fig. i, hav- 

 ing longer and narrower points ; several aneurism 

 needles of the form shown in III, Fig. i, for passing 

 ligature threads round blood-vessels, etc.; one or more 

 pairs of strong bone forceps such as can be obtained 

 from any instrument-maker ; a number of small sponges 

 and a small saw. 



Caniuilas and Injecting Syringe. The cannulas 

 used in injecting can readily be made of any desired 

 size from ordinary glass tubing. The steps in the pro- 



