The relations oï iiiitii(|i(iii(lii:i und oflicr cytoplasniic coiistifuoiits etc. f^i)',', 



10. Fixed ill chniiiie-suhliiiiate at 40" (;, stained witli iron hematoxylin and 

 counter.stained hy (lie ajiplication of ileld's erytiirosin-inethylene blue method 

 (i. e. liis first method for neurosomes). Mitochondria black, neurosomes of Held 

 type I red and flic Xissi substance red uidi a tin{,'e of purple. Section 3 n 

 (pag. 488). 



11. Fixed in chrome-suhlimate at 40'* C, and stained by Bensley's neutral 

 safranin method. Mit.ocliondria and neurosomes of Held type I l)luish green, and 

 the Nissl substance red with a tinge of purple (pag. 485). 



12. Fixed in Canioy's 6:3:1 fluid and stained by Held's erythrosin-methylene 

 blue method, i. e. his first method for neurosomes. Neurosomes type I red, Nissl 

 substance blue (pag. 477). 



13. Same, axone hillock showing neurosomes and neurofibrils togetiier (pag. 5). 



14. Prepared by Kopsch method, followed by staining in a saturated aqueous 

 solution of safranin and differentiation in 95"/,, alcoliol. C'analicnlar apparatus 

 black and Nissl substance red (pag. 493). 



15. Stained intravitam with a 1:1000 solution of pyronin in 0,75 "/o sodium 

 chloride solution. The canalicular apparatus appears as a network of clear, uii- 

 colored, continuous spaces winding in and out in a highly granular red-stained 

 cytoplasm. Zeiss apochromatic objective 3 mm and compensating ocular 4. Magni- 

 fication of about 404 diameters (pag. 490). 



16. Prepared by Kopsch's method. Shows excentric type of blackened canali- 

 cular apparatus. Section 5 /< (pag. 493). 



17. Same. Shows circumnuclear type of blackened canalicular apparatus. 

 Section 6 f( (pag. 493). 



18. Stained intravitam with a 1 : 10,000 solution of Janus green in 75**/^ 

 sodium chloride solution. Mitochondria bluish green. Zeiss apochromatic objective 

 3 mm, compensating ocular 4, and camera lucida. Magnification 380 diameters 

 (pag. 481). 



Plate XVI. 



These figures, and the first row on plate XVII, illustrate the similarity in the 

 form and in the cytoplasmic arrangement of the canalicular apparatus as demon- 

 strated by the methods of Nelis, Holmgren, Kopsch. Bensley and Kingsbury. 

 A horizontal row of figures is devoted to each. Three types of network, the diffuse, 

 the excentric and the circumnuclear are represented and are arranged in vertical 

 columns, thus making the correspondence between the results of the different 

 methods of technique even more striking. In all, the canalicular system has been 

 drawn with great precision; but. for the sake of simplicity, the other cytoplasmic 

 components have been omitted and the nuclei have been shown in a diagrammatic 

 fashion. 



19. 20 and 21. From a spinal ganglion fixed in T^^'g formalin and stained 

 with iron hematoxylin (Nelis, 1900). Canalicular system as clear, nncolored spaces 

 (pag. 492). ■ 



22, 23 and 24. From a single spinal ganglion fixed in trichlorlactic acid 

 and stained with Weigert's resorcin-fuclisin (Holmgren. 1901). Canalicular system 

 as clear, colorless spaces (pag. 492). 



25, 26 and 27. From a single spinal ganglion treated with 2*^/0 osmio acid 

 for eight days (Kopsch, 1902). The canalicular system appears as a rough. 



