RESEARCHES 



INTO THE CONNECTION EXISTING BETWEEN 



AN UNNATURAL DEGREE OF COMPRESSION OF 



THE BLOOD CONTAINED IN THE 



RENAL VESSELS, 



AND 



THE PRESENCE OF CERTAIN ABNORMAL 

 MATTERS IN THE URINE. 



[From the twenty sixth volume of the MEDICO-CHIRURGICAL 

 TRANSACTIONS, published by the Royal Medical and Chirurgical 

 Society of London. Communicated by MARSHALL HALL, M.D., 

 F.R.S., &c. Read February 14th, 1843.] 



HAVING undertaken some experiments with the 

 view of determining the precise cause of the appear- 

 ance of albumen in the urine, I found that not only 

 liquid albumen and blood, but coagulating lymph or 

 fibrine also escaped into the urinary passages as the 

 consequence of an obstruction to the return of 

 blood through the renal vein. As the unnatural 

 compression of the blood in the renal vessels, thus 

 artificially produced, gave rise to phenomena iden- 

 tical with those constituting the primary effects of 

 inflammation, and as the kidney seemed to present 

 greater facilities for an experimental investigation 

 of that important subject than any other organ of 

 the body, I was induced to extend my observations, 



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