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POPULAR SCIENCE MONTHLY
another picture illustrates yet other peculiarities of the adult nerve cells. The upper figures in this plate are taken from cells which have been colored uniformly of a very dark hue, in consequence of which
Fig. 10. Sections of Four Sorts of Epithelium. After Sobotta.
they are rendered so opaque that the nucleus which they really contain is hidden from our view. But the deep artificial color makes it easy to follow out the form of the cells and the ramifications of their long processes. In the middle figures we have cells which have been stained by another method which brings out very clearly to the eye the fact
