450 F. W. CARPENTER 
After the ganglia desired for study had been dissected out, they 
were fixed over night in a 10 per cent solution of ammonium 
molybdate, then washed in running water, dehydrated in grades 
of alcohol, cleared in xylol, and embedded in paraffin. The 
sections were cut from 25 to 50 micra in thickness. 
For comparison, preparations of the otic ganglion were made 
by the silver nitrate method of Ramén y Cajal. These were 
of some value in showing the form of the ganglion cells and 
their processes, but in them the terminal end nets were not 
differentiated. 
OBSERVATIONS 
In this investigation attention has been directed chiefly to the 
endings of the preganglionic fibers on the cell-bodies of the post- 
ganglionic neurones. In using methylene blue intra-vitam staining 
to demonstrate nerve terminations it has been found that the 
treatment of the ganglia in such a manner as to differentiate these 
clearly usually leaves the cell-bodies, about which the endings are 
arranged, partially or wholly unstained. On the other hand, when 
the cell bodies and their processes are deeply colored, the endings 
of the preganglionic fibers are almost always invisible. It follows, 
therefore, that the majority of my preparations are not suitable 
for the study of the morphology of the postganglionic neurones. 
There occur, however, here and there in the sections, ganglion 
cells sufficiently well stained to warrant giving some account of 
their structure. 
The postganglionic neurones 
In the sphenopalatine, otic and submaxillary ganglia of the sheep 
the cells are multipolar in character, with long, slender, sometimes 
branching dendrites, which penetrate the cell capsule, and often 
run for surprising distances among the intercellular fibers. Such 
cells are shown in figures 1, 2 and 3. The boundaries of the cell 
capsules are marked by dotted lines, except in figure 2, where 
the position of the capsule is indicated by several of its nuclei. 
Among the processes given off by the cell-bodies, I have often 
found it difficult to distinguish the neurite from the dendrites. 
