Page:Popular Science Monthly Volume 71.djvu/372

This page has been validated.
366
POPULAR SCIENCE MONTHLY

consequently we see that the protoplasm around the nucleus in both of these figures is no longer simple and uniform, but contains these deposits of dark-colored material. Here are other nerve cells; the one

PSM V71 D372 Various kinds of human nerve cells.png

Fig. 45. Various kinds of Human Nerve Cells. After Sobotta.

in the center shows you the accumulation of pigmented matter in the protoplasm; again an index of a change and lack of the previous uni-