CERTAIN DEVITALISED TISSUES. 253 



yellow colour, and not half the size of the right, 

 which was healthy, but somewhat enlarged. 



The left kidney (the artery and vein of which 

 were completely closed by the ligature) was en- 

 veloped by a cyst, on the surface of which some 

 small vessels were perceptible. On dividing this 

 cyst, a yellow pulpy matter was exposed, evidently 

 formed by the disintegration of the cortical portion 

 of the kidney, its central part being comparatively 

 firm and natural. Near the pelvis of the gland, and 

 at a point corresponding with the entrance of the 

 vessels, was a loose calcareous ring, having in its 

 centre a larger and a smaller circular aperture, its 

 circumference being in contact with, and gradually 

 thinning towards, the yellow pulpy matter. This 

 latter, which was interposed between the internal 

 surface of the cyst and the unliquefied portion of the 

 kidney, when viewed by the microscope, consisted 

 of granular matter, the particles of which varied 

 in size, together with fat globules and crosses of 

 altered hsematosine. 



On being allowed to dry, the pulpy matter became 

 in parts semi-transparent, and opaque particles were 

 distinctly seen to be imbedded in it. Being ex- 

 amined under a magnifying power, calcareous par- 

 ticles were perceived to be finely disseminated 

 throughout the mass. A small piece of the dried 

 pulpy matter was heated with liquor potassce, and 

 partially dissolved, emitting a peculiar odour. The 

 sediment which remained was found, under the 

 microscope, to consist of innumerable particles ex- 

 hibiting different forms, some half-crystalline, others 



