328 THE SPINAL CORD, BY J. GERLACH. 



of each of which is called the anterior cornu (fig. 217, m), whilst 



Fig. 217. 



Fig.. 217. Transverse section of the spinal cord of a Child six months 

 of age, taken from the middle of the lumbar enlargement, and treated 

 with chloride of gold and potassium, and nitrate of oxide of uranium. 

 By means of these reagents the course of the fibres in the grey sub- 

 stance is rendered extraordinarily distinct. Magnified 20 diameters, 

 a, Anterior column ; 6, posterior column ; c, lateral column ; d, ante- 

 rior roots of a spinal nerve ; e, posterior root ; /, anterior white com- 

 missure, with fibres proceeding from the anterior white columns, and 

 from the anterior cornua of the grey substance ; g, central canal, lined 

 with epithelium ; 7i, connective tissue surrounding the central canal ; 

 i, transverse fibres of the grey commissure in front of the central 

 canal ; fc, transverse fibres of the grey commissure behind the central 

 canal ; I, transverse section of the two central veins ; m, anterior 

 cornu ; n, great lateral column of cells of the anterior cornu ; o, small 

 anterior column of cells ; p, smallest median column of cells ; g, 

 posterior cornu ; r, ascending column of fibres in the posterior 

 cornu ; s, substantia gelatinosa. 



the posterior half constitutes the posterior cornu (fig. 217, q). 



