PATHOLOGY. 51 



wash the wound with a strong solution of alum in 

 •water. 



The nitrous acid, or strong aquafortis, has been 

 found very useful in fistulous ulcers ; the parts being 

 touched with a feather dipped in it occasionally, and 

 the above-mentioned drefsing applied afterwards. 



Of Hemorrhage, or Bleeding in general. 



BY Haemorrhage is meant an effusion of blood 

 From any of its containing vefsels, into internal 

 parts of the body, where there is no outlet ; or 

 upon an external surface, rendered so by accident. 



We shall first consider those where external 

 treatment may be applied. It may either be arte- 

 rial or venous, or both. If it is from an artery, 

 the blood is of a florid red colour ; and if from 

 a large trunk, it comes out in an interrupted 

 stream, the bleeding from veins is of a darker co- 

 lour, and comes out in an uninterrupted stream. 

 The dark colour does not always prove it to be 

 venous: for some times, though it will at first 

 fiow from a vein of a dark colour, yet the sub- 

 sequent blood shall be of a florid red, owing to 

 its pafsing from an artery to a vein. 



Bleedings taking place from arteries, are more 

 dangerous than those from veins 3 and particularly 



X>2 



