a HEPWORTU, ON THE MICROSCOPE. 



the long bundles of the crystals of that substance ; the colour 

 was also unlike, with both reliectecl and transmitted light. 



On examining the lining membrane of the pelvis of the 

 kidney, in the same subject, I detected a vegetation, which 1 

 shall, for want of a better, name Sarcina renis [vide PL I, 

 fig. 2.) 



About two years ago I met with a similar substance w^hilst 

 examining some urine, but from its great similarity to one of 

 the Desmidiea, I concluded that it might possibly have got 

 there by accident, and made no memorandum of it, except a 

 sketch. 



I find no notice of such a vegetation in Dr. L. Beale's 

 excellent work on the microscope. In speaking of " matters 

 of extraneous origin frequently met with in urine," he makes 

 this very judicious remark, " With the microscopic characters 

 of these bodies (giving a list at page 196) the student should 

 be perfectly familiar as soon as possible, &c. Without this 

 precaution he will find himself in constant difficulty, and his 

 ignorance will cause him to make the most ludicrous mis- 

 takes." 



There was no particular symptom indicative of the presence 

 of these bodies, but in both the cases alluded to there was a 

 general low state of vitality, as is always the case where vegeta- 

 tions are formed ; for instance, in Sarcina ventriculi, aphthae, 

 &c. This reminds me of a sketch which I took some years 

 ago of a specimen of aphthae from a consumptive patient, 

 which struck me as being peculiar (PI. I, fig. 3). I am 

 not aware whether it assumes this appearance in consumption 

 invariably or not. The specimen (fig. 4) is a representation 

 of the ordinary aphthaj in children. 



A boy, 13 years of age, with enlarged cervical glands, 

 had complete obstruction of the bowels. There was hemor- 

 rhage, tympanitis, and occasional excruciating pain of the 

 whole abdomen, stercoraceous vomiting, &c. 



Post-mortem examination, ff teen hows after death. — Tlielum- 

 'bar glands were enlarged, and had implicated the ileum imme- 

 diately above the caecum; small intestines very much increased, 

 and large ones much diminished in capacity. In the imme- 

 diate vicinity of the enlarged glands the intestines were not 

 more than five eighths of an inch in diameter, and the obstruc- 

 tion was rendered still more complete by the protrusion of a 

 mass of coagulal)le lymph inwards, arising from the condensed 

 inner fibrous aponeurosis of the muscular coat, which Avas 

 completely absorbed, leaving only cellular tissue containing a 

 few vessels. Tliere was general peritoneal inflammation and 



