ORIGIN OF COLORED BLOOD-CORPUSCLES. 



99 



older an animal (dog, cat, or rabbit) we examine, the 



we find its articular cartilage, and the less of shining, 



coarseiy granular corpuscles ; in the cartilage of a very old 



dog such corpuscles were entirely wanting only pale granular 



nucleated were present. 



On the calcified border of the articular cartilage of a young 

 rabbit, I found large spaces in the narrow calcified basis-substance, 

 which were partly filled with a colorless, finely granular proto- 

 plasm, and their centers exhibited the glistening substance. In 

 the large spaces below these, groups of bright lumps of differ- 



FlG. 27. CONDYLE OF FEMUR OF A YOUNG RABBIT, AT THE BORDER OF 

 CALCIFICATION OF THE DIAPHYSEAL CARTILAGE. SAGITTAL SECTION. 

 [PUBLISHED IN 1872.] 





CC, cartilage-corpuscles, filling the spaces of the calcified basis-substance, CA ; changing 

 in one level into hsematoblasts, L, and below this level into medullary corpuscles, P. The 

 spindles in the middle of the medullary spaces are forming blood-vessels. Magnified 800 

 diameters. 



