. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. SPLEEN. 779 the greatest quantity, and are most easily seen. The constant and essential elements of the splenic vesicles are cells, with a single nucleus of a spherical shape, and from 3 to 5-1000ths of a line in diameter: besides these, free nuclei, and larger cells of 6-1000-ths of a line in diameter, and with one or two nuclei, also occur (Jig. 529.). The cells are in general pale and faintly granular; their nuclei are from 16 to 25-10000ths of a line in size, spherical, apparently homogeneous, and with a rather dark
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. SPLEEN. 779 the greatest quantity, and are most easily seen. The constant and essential elements of the splenic vesicles are cells, with a single nucleus of a spherical shape, and from 3 to 5-1000ths of a line in diameter: besides these, free nuclei, and larger cells of 6-1000-ths of a line in diameter, and with one or two nuclei, also occur (Jig. 529.). The cells are in general pale and faintly granular; their nuclei are from 16 to 25-10000ths of a line in size, spherical, apparently homogeneous, and with a rather dark margin ; or frequently vesicular, with a more or less distinct hucleolus and other granules. It is not infrequent to see. Elements of the Malpighian corpuscles of the Ox, mag- nified 350 diameters. a, smaller cells; b, larger cells; c, free nuclei. single cells provided with dark fatty granules, and in particular instances blood discs are present, either changed or unchanged, free or included in cells. The free nuclei are of the same size as those contained in cells, and are also, in other respects, quite similar to them. In the ordinary method of examining the Malpighian corpuscles, the quantity of them nuclei seems larger than it really is, since many of the cells burst, and allow their nu- cleus to escape. Yet it is very remarkable that their number is very variable in the most cautious examination, a fact which appears to me partly to account for the very different statements of different 'observers. In many cases it has happened to me to find only a few free nuclei, often none at all, while in other instances they constitute a half or more of the elements of the corpuscles. This fact, taken together with the often very different size of the cells present, seems to prove that a continuous process of cell-growth exists in the Malpighian corpuscles ; in such wise, that new nuclei and cells continually arise, and old cells perish. But hereof more will be said in speaking of t
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