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Fic. 11.—The Intracellular Network and the Intercellular Twistwork in the Grey Sub- 
stance of the Central Nervous Organs. A and B, the Punktsubstanz in the ganglions 
of Hirudo (twistwork) ; D and E, nerve-cells in the spinal cord and the cortex of the 
brain of a rabbit. In the cells is seen the intracellular network of fibrils, and between 
the cells is shown the twistwork of intercellular fibrils. 
bearing on the neurone theory and on our ideas regarding the construction 
and function of the nervous system as a whole. Those groups of scientists 
who have proclaimed the presence of reticulum cannot in this particular 
find support in the results even of their own methods. I have myself seen 
thousands of excellent preparations produced by the Golgian method, but 
have never seen real reticula in the grey substance of either the higher or 
* the lower animals. I have carefully studied a series of preparations 
