68 



INJECTING APPARATUS. 



white metal syringe does fairly well, or the following method 

 may be employed : Place a good-sized glass funnel in a large 

 ring of a retort stand. Slip a piece of black rubber tubing 

 over the tube of the funnel, and fasten it on firmly with 

 cord or small wire. Put a pinchcock on the lower end of 

 the tube. Now pour the starch injection mass into the funnel. 



Glass Funnel 



Glass Cannula 



i ;.,:;. : [/ 



Fig. 21. Injecting Apparatus. 



Loosen the pinchcock, and let a little of the mass run out, to 

 be sure that the tube is full. Now slip the end of the tube 

 on the cannula, loosen the pinchcock, and inject by " strip- 

 ping " the rubber tube ; or the process might well be described 

 by the term " milking," as it is like that process. Hold the 

 upper part of the tube with one hand, and with the other the 

 mass may be driven into the aorta. One great advantage of 

 this method over the use of a syringe, is that the operator 



