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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
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-
