The course of the vein may easily be determined by pressing upon it, 

 when the part furthest from the heart will become distended, by the blood 

 accumulating in its channel. The spot we select for opening the vein, is nine 

 or ten inches from the angle of the jawbone, and the amount of blood to be 

 abstracted varies from one to four quarts. It is best to press the edge of the 

 receiving vessel against the cut end of the lower part of the incised vein. 

 When sufficient blood is removed, a pin is passed through the edges of 

 the incised wound. Horse-hair is then wound round the ends of the pin in 

 the form of a figure 8. In six days or so, the pin may be removed. 



