204 PRACTICE OF THYSIC. 



hsemorrhagies which form an order in our Nosology, I shall 

 treat of active haemorrhagy in general ; and indeed the several 

 genera and species to be treated of particularly afterwards, have 

 so many circumstances in common with one another, that the 

 general considerations to be now offered, will prove both proper 

 and useful. 



SECTION I. OF THE PHENOMENA OF H^MORRHAGY. 



DCCXXXVIII. The phenomena of haemorrhagy are gen- 

 erally the following. 



Hasmorrhagies happen especially in plethoric habits, and to 

 persons of a sanguine temperament. They appear most com- 

 monly in the spring, or in the beginning of summer. 



For some time, longer or shorter in different cases, before the 

 blood flows, there are some symptoms of fulness and tension 

 about the parts from whence the blood is to issue. In such 

 parts as fall under our view, there are some redness, swelling, 

 and sense of heat or of itching ; and in the internal parts, from 

 which blood is to flow, there is a sense of weight and heat ; and 

 in both cases various pains are often felt in the neighbouring 

 parts. 



DCCXXXIX. When these symptoms have subsisted for 

 some time, some degree of a cold stage of pyrexia comes on, and 

 a hot stage is formed, during which the blood flows of a florid 

 colour, in a greater or lesser quantity, and continues to flow for 

 a longer or shorter time ; but commonly, after some time, the 

 effusion spontaneously ceases, and, together with it, the pyrexia 

 also. 



DCCXL. During the hot stage which precedes an haemorr- 

 hagy, the pulse is frequent, quick, full, and often hard ; but 

 as the blood flows, the pulse becomes softer and less frequent. 



DCCXLI. In haemorrhagies, blood drawn from a vein does, 

 upon its concreting, commonly show the gluten separated, or a 

 crust formed, as in the cases of Phlegmasiae. 



DCCXLII. Haemorrhagies, from internal causes, having 

 once happened, are apt, after a certain interval, to return in 

 some cases very often, and frequently at stated periods. 



DCCXLIII. These are, in general, the phenomena of hae- 



