CONTENTS. 
PAGE. PAGE. 
Introduction® 2% a0 06s bessoat woee aaa 3 Atropine stimulation of the spinal cord. 23 
Distribution of the large gland-cells.... 4 Discussion of results from spinal-cord 
Morpholozyicc ose ik as ee a ee 5 Stimulation. ce acetate coe 
isto renesisiens: tists teste niae ae nhs aie 10 Effect of amputation of the tail....... 27 
GomparativerstuGy,..aisus sees oan nee LO MRerencratlon ean cise woe Sere ore 28 
Gland-cell hypothesis................. 12 Future lines of investigation.......... 28 
Phagocyte hypothesis and vital staining Summary <2 crate thors pee eerakens ener 29 
EXPELIMENtS:s)+ 2/6. o tsencuine 6 eee 16 Warteratumet ce cadusi sts ayeks tue sic Pore enone 29 
Chemical nature of the granules....... 19 Explanation of abbreviations used in the 
Electrical stimulation of the spinal cord 20 figures’ of the“plates’..........cssce. 30 
Pilocarpine stimulation of thespinalcord 22 Hxplanation’of ‘plates<.: se 5 ..0. sae 30 
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