H7EMORRHAGIES. 309 



the management of the haemorrhoides vesicse, I would apply 

 the whole of the doctrines that I have delivered above with 

 respect to the cure of the proper hoemorrhoidal affection. 



MXLIII. There remains still to be mentioned one other in- 

 stance of symptomatic hsematuria, which is that which happens 

 in the case of confluent and putrid smallpox, as well as in se- 

 veral other instances of putrid diseases. The blood, in such 

 cases, may be presumed to come from the kidneys ; and I ap- 

 prehend that it comes from thence in consequence of that 

 fluidity which is always produced in the blood approaching to 

 a putrid state. Such haematuria, therefore, is not to be con- 

 sidered as a symptom of any affection of the kidneys, but merely 

 as a mark of the putrescent state of the blood. 



MXLIV. In certain diseases, the urine is discharged of such 

 a deep red colour, as to give a suspicion of its being tinged by 

 blood present in it ; and this has given occasion to Sauvages, 

 amongst the other species of haematuria, to mark the Haematuria 

 spuria, and the Haematuria lateritia ; both of which, however, 

 he supposes to be without any blood present in the urine. In 

 many cases it is of importance, in ascertaining the nature of a 

 disease, to determine whether the red colour of the urine be 

 from blood present in it, or from a certain state of the salts and 

 oils, which are always in greater or less proportion constituent 

 parts of the urine ; and the question may be commonly deter- 

 mined by the following considerations. 



It has been observed above, that, when any considerable 

 quantity of blood is voided with the urine, there is always a 

 portion of it deposited at the bottom of the vessel containing 

 the voided blood and urine ; and in such a case there will be no 

 doubt in attributing the colour of the urine floating above to 

 some part of the blood diffused in it. The question, therefore, 

 with respect to the presence of blood in the urine, can only 

 occur when no such deposition as I have mentioned appears ; 

 and when the blood that may be supposed to be present is 

 dissolved or diffused, and therefore entirely suspended in the 

 urine. In this case, the presence of the blood may be common- 

 ly known, 



ls#, By the colour which^ blood gives, different from any 



