HuBER, Sympathetic Nervous System. 103 



that nearly all glands have been studied either with the Golgi 

 or the methylen-blue method and further to show that in the 

 branched tubular or racemose glands studied a unanimity exists 

 in the results obtained ; certainly so far as pertains to grosser 

 distribution of the nerve fibers. It may be seen that bundles 

 of nerve fibers, largely composed of non-medullated fibers, or 

 in other words of the neuraxes of sympathetic neurons, enter 

 the gland with the gland ducts and with the vessels. On enter- 

 ing the glands they form a plexus around the branches of the 

 ducts and vessels, from which fibers or small bundles of fibers 

 are given off which surround the secreting alveoli or tubuli to 

 form the epilamellar plexus. Concerning the mode of the ter- 

 minal ending, opinions differ as yet. The greater portion of 

 the evidence points however to an ending on the gland cells, 

 either in a free ending or in a small end-bulb or, as the work of 

 Arnstein and his pupils would show, in a more complicated 

 end-apparatus, resting on the cells. That the non-medullated 

 nerve fibers found in the glands are the neuraxes of sympathetic 

 neurons, may be seen in sublingual or submaxillary glands ; 

 where, especially in the latter, large numbers of small ganglia 

 are found in the gland itself. The writer (62), in an article in 

 which he discusses, the innervation of the sublingual and the 

 submaxillary glands in the dog, has shown that these ganglia, 

 which are situated in the connective tissue surrounding the 

 gland ducts, are composed of sympathetic nerve cells. In tissue 

 impregnated after the Golgi method and cut so that the plane 

 of section is more or less parallel with the gland ducts, the 

 neuraxes of the sympathetic neurons may often be followed for 

 long distances by the side of the gland ducts, their branches 

 forming the plexus surrounding the ducts above referred to. In 

 a few instances a neuraxis coming from a sympathetic nerve 

 cell, which was observed following a duct, could be followed as 

 it left a duct and approached a group of alveoli ; and in one 

 instance of a section of a chorda-lingual triangle, which con- 

 tained a portion of a sublingual gland, two sympathetic cells 

 deeply stained were seen, the axis cylinder of one of which 

 could be followed for quite a distance by the side of an inter- 



