CHAP. II.] STONE: SECRETION OF URINE. 155 



immediately with the bladder, and the water they 

 convey is formed by the outermost red part of the 

 organ drawing the blood into it, and through which 

 it is filtered by the vascular or whitish part which 

 lies next withinside ; here numerous little tubes 

 convey it to the centre one, or ureter, that enters 

 the cavity of the os pelvis at the conjunction of H. 

 with 34, on the plate of a skeleton, where the 

 bladder is situate, which receives the water. 



The blood, which has been so filtered of its 

 urine, is absorbed by a vein, which is plainly visi- 

 ble in the section of the kidney ; and the whole 

 function shows how rapidly circuitous any medicine 

 must act, which being poured into the stomach is 

 found, in so short a space as two or three hours, to 



cause, whose diseases had baffled the skill of many clever farriers. 

 He had been long declared to have " a complication ;" that is to say, 

 none knew his disease, for he occasionally voided blood with his urine, 

 in great pain ; they had, therefore, given him diuretics to such an ex- 

 cess, that he could not bear the hand's passing along his back over the 

 kidneys ; his sheath showed signs of cedematous swelling, and upon 

 that region being touched he became unruly. However, we saw 

 enough to ascertain, by the heat and tension of the part, that it was 

 inflamed ; and, as his pulse was high, his tongue hot and dry, it was 

 proposed to bleed him, and to foment the part ; the operation^ how- 

 ever, was scarcely performed when its owner resolve* to take no 

 further trouble, and the horse was slain. On examination we found 

 his kidneys were rotten, and as pervious as dough ; ulcers appeared 

 upon both lobes of the liver, and the neck of the bladder was in- 

 flamed a little. The sheath preserved its size ; and on the top of the 

 penis a small angular stone, the cause of all this mischief, lay buried 

 under the cuticle; and would, it is apprehended, have come away in 

 the course of a day or two spontaneously. Its weight might be 10 

 grains. How it got there is most inscrutable. 



h6 



