NERVES. 



[ 459 ] 



NERVES. 



Fig. 520. 



Large cells from the gray cortical layer of the human cerebellum. Blagnified 350 diameters. 



Fig. 521. 



Fig. 522. 



Fig. 521. Sixth thoracic sympathetic ganglion of the left side of a rabbit, seen from behind, after treatment with 

 soda. T.2, trunk of sympathetic; J?. c, communicatmg branches, each bifurcating; Spl. splanchnic branch; S, gan- 

 glial branch, with large and small branches probably going to vessels ; g, ganglion-globules and ganglial fibres. 

 Magnified 40 diameters. 



Fig. 522. 1. Ganglion- globules from a spinal ganglion of a four-months' human foetus, a, nucleus in the pale process 

 of the cell. 2. Nerve-tubes in development, from a two-months' himian foetus. 3. Cells from the cineritious 

 cerebral substance of the same foetus. 



Fig. 523. l.Two nerve-fibres from the ischiatic nerve of a four-months' foetus. 2. Nerve-tubes from a newly-born 

 rabbit ; a, sheath ; b, nucleus ; c, white substance. 3. Nerve-fibre from the tail of a tadpole : u, b, c, as above ; at d 

 the fibre has still the embryonic character. 



