WELCKER, OX SARCINA. 165 



3. A few pus- or mucus-corpuscles, and some traces of 

 epithelium (but no fibrinous casts, and the urine was never 

 albuminous) . 



As nearly as could be estimated, the Sarcina constituted 

 95, the crystals 4, and the other corpuscles 1 per cent, of 

 the morphological elements in the urine . 



The Sarcina presented the following diversities of form in 

 the corpuscles : 



1. Isolated cells, 0*0010 to 0*0018 mm. in diameter, which, 

 although, on the whole, of a rounded form, in larger specimens 

 were more angular and cubical. That these were really 

 sarcina-cells, elements of the cubes to be presently described, 

 is shown, in the first place, by their size, which much exceeded 

 that of colourless blood-corpuscles or pus-cells. On the 

 application of acetic acid also, no nucleus was rendered 

 apparent in the sarcina-cells, as in the bodies just men- 

 tioned ; whilst iodine produced in them the same yellowish- 

 brown colour as in the entire sarcina-cubes. 



2. Cubical masses, exhibiting on each face four cells, and 

 which consisted therefore of eight cells. The sides of the 

 smaller of these cubes measured 0*0020 mm., and of the 

 largest 0*0027 mm. 



3. Cubes with four cells on each side, that is to say, con- 

 stituted of sixteen cells in each face, and consequently 

 forming packets of sixty -four cells. Each side of these cubes 

 was 0*0042 mm. to 0*0052 mm. long. Larger cubes than these 

 were never observed in the urine. On the other hand, in 

 some specimens of the sixty-four celled packets, it might 

 very readily be seen that these bodies were to some extent not 

 mathematical cubes. In these instances the face presented 

 to the observer was for the most part an oblong, 0*0052 mm. 

 in length, and 0*0050 mm. in breadth. The illuminated 

 cross, constituted of two lines bisecting each other in the 

 middle, and by which the sixteen cells are divided into four 

 groups, exhibited in these cases a longer and shorter limb ; 

 a condition which probably indicates the first line of fissure 

 of the entire bundle. Lastly, the urine presented : 



4. Columnar sarcina-masses, 0*0050 mm. long, 00025 mm. 

 broad, and exhibiting on the four larger faces eight, and 

 in the two smaller four, and consequently, in the whole, 

 sixteen cells. These masses, in all probability, arise from 

 the division of the sixty-four cell bundles. 



By far the majority of the sarcina-masses in the urine 

 belonged to the second and third forms, that is to say, were 

 cubes composed of eight or of sixty-four cells. 



It at once occurred to me that the sarcina-masses ejected 

 from the stomach are of far larger dimensions than those just 



