236 PRACTICE OF PHYSIC. 



tity, and frequently continues to appear at times for several 

 days .together. It is sometimes profuse ; but rarely in such 

 quantity as, either by its excess, or by its sudden suffocation, 

 to prove immediately mortal. It commonly either ceases spon- 

 taneously, or is stopped by the remedies employed. 



DCCCXLI. When blood is thrown out from the mouth, it 

 is not always easy to determine from what internal part it pro- 

 ceeds ; whether from the internal surface of the mouth itself, 

 from the fauces, or adjoining cavities of the nose, from the 

 stomach, or from the lungs. It is, however, very necessary to 

 distinguish the different cases ; and, in most instances, it may 

 be done by attending to the following considerations. 



DCCCXLII. When the blood spit out, proceeds from some 

 part of the internal surface of the mouth itself, it comes out 

 without any hawking or coughing : and generally, upon inspec- 

 tion, the particular source of it becomes evident. 



DCCCXLIII. When blood proceeds from the fauces, or 

 adjoining cavities of the nose, it may be brought out by hawk- 

 ing, and sometimes by coughing, in the manner we have de- 

 scribed in DCCCXXXVII. and DCCCXXXIX. ; so that, in 

 this way, a doubt may arise concerning its real source. A 

 patient often lays hold of these circumstances to please himself 

 with the opinion of its coming from the fauces, and he may be 

 allowed to do so : but a physician cannot readily be deceived, 

 if he consider, that a bleeding from the fauces is more rare than 

 one from the lungs ; that the former seldom happens but to 

 persons who have been before liable either to an hsemorrhagy 

 of the nose, or to some evident cause of erosion ; and, in most 

 cases, by looking into the fauces, the distillation of the blood, if 

 it comes from thence, will be perceived. 



DCCCXLIV. When blood proceeds from the lungs, the 

 manner in which it is brought up will commonly show from 

 whence it comes: but, independent of that, there are many 

 circumstances which may concur to point it out, such as the 

 period of life, the habit of body, and other marks of a predis- 

 position (DCCCXXXIIL DCCCXXXV.) ; and, together 

 with these, the occasional causes (DCCCXXXVI.) having 

 been immediately before applied. 



DCCCXLV. When vomiting accompanies the throwing out 



