PROCZEDINGS 0? THE ROYAL SOCISTT. 



a. f a f 



Scale, x^ao of an English Inch I I X 700. 



Large candate nerve cell, with smaller cells and nerve fibres, from a thin transverse section of the lower 

 part of the grey -matter of the rr.edulla oblongata of a young dog. The specimen had been soaiked for 

 some weeks in acetic acid and glycerine. The hnes of dark granules resulting from the action of the acid 

 are seen passing through the very substance of the cell in very definite directions. Thus the cell is 

 the point where lines from several distant .parts intersect (Diagram. Fig, 2). It is probable that each 

 of these lines is but a portion of a complete circuit (see Diagram in Fig. 3). A, A, A, large fibres which 

 leave the cell. B, a fibre frora another cell, dividing into finer fibres, exhibiting several lines of granules. 

 C,C, C, fibres from a younger caudate nerve vesicle. D, fine and flattened dark-bordered fibres. E, three 

 flne nerve fibres running together in a matrix of connective tissue. F, F, F, capillary vessels. 



3, B. del. 



i8oa, 



