226 
MR. T. SNOW BECK ON THE NERVES OF THE UTERUS. 
vessel, and lying upon the middle coat. The origin and subsequent interlacing of 
the tubular and gelatinous fibres is better seen in the small branches which pass 
from the posterior part of the thoracic ganglia. These branches, from their small size, 
can be examined by the compound microscope without any previous manipulation. 
At their origin from the ganglion, the tubular and gelatinous fibres are in distinct 
and separate bundles ; and after proceeding a short distance, the fibres composing 
the two bundles gradually spread out and become interlaced with each other. In 
some instances, where the small branch bifurcates soon after it leaves the ganglion, 
the tubular fibres, composing the tubular bundle, divide into two portions, which pass 
out in the two minute branches in which the small parent branch divides ; the gela 
tinous fibres, composing the gelatinous bundle, likewise divide into two portions, 
which also pass out in the two minute branches and become mixed with the tubular 
fibres. The crossing of the gelatinous and tubular fibres in the parent trunk to gain 
their ultimate destination, is exceedingly well-marked. If the fibres composing these 
small branches be followed towards the so-called trunk of the sympathetic, we find 
that the gelatinous fibres take their origin at the corpuscles of the ganglion, and that 
the tubular fibres are traced through the ganglion to the white cord connecting the 
spinal and sympathetic nerves. In this case, as in the preceding one, the tubular 
fibres do not arise from the ganglion, but can be shown to be emanations from the 
spinal nerves. The origin of these small branches by distinct bundles of gelatinous 
and tubular fibres, and their subsequent interlacing, bear a striking resemblance to 
the origin of the spinal nerves, by distinct bundles of motor and sensitive tubules, 
and their subsequent interlacing. v 
7-7- Branches of the sympathetic distributed to the supra-renal capsule from the 
semilunar ganglion. 
8. Small ganglion on these nerves. 
9.9. The renal plexus surrounding the renal artery. 
10. Branches from the renal plexus which accompany a branch of the renal artery 
to the upper part of the kidney. 
11.11.11.11. Ganglia in the course of the renal plexus. Besides these ganglia, 
there are many much smaller which could not be shown in this drawing, some of 
which are so minute as to measure but the ^th of an inch in diameter. The gela- 
tinous fibres of the renal plexus are chiefly derived from the semilunar ganglion 
(3.3.3), though many arise from the ganglia in the plexus (11.11, &c.). The tubular 
fibres are derived from the lower intercostal nerves through the medium of the lesser 
splanchnic nerves (2.2). 
12.12.12. The ganglia of the abdominal sympathetic of the right side. 
13.13. The so-called trunk of the sympathetic of the right side. 
14.14.14.14. Branches which pass from the lumbar nerves and trunk of the sym- 
pathetic, and enter the superior aortic plexus (21.21.21, &c.). 
15.15.15. Three ganglia of the abdominal sympathetic of the left side. 
