Literary Notices. clxv 



tively few dendrids, crosses in the protoplasmic commissure to the 

 other side of the cord there to come into relations with the terminal 

 ramifications of the descending respiratory fibres of this side. The 

 terminal ramifications of the descending respiratory fibres of each 

 side thus come into contact with dendrids of different origins ; first 

 with many dendrids of the motor phrenic cells of their own side and 

 second with relatively fewer dendrids from the motor phrenic centres 

 of the opposite side. (3) The descending respiratory excitations are 

 chiefly discharged in the motor phrenic cells of the same side because 

 the dendrids of this side are more numerous and therefore present 

 less resistance than the fewer dendrids which have crossed over from 

 the motor phrenic cells of the other side. (4) The section of one 

 phrenic nerve interrupts the customary respiratory path of the same 

 side and the stimulus crosses to the opposite side by means of the de- 

 cussating dendrids and thus excites the other phrenic nerve. 



Intrinsic Nerves by the Golgi Method. 



The second Report in Neurology from the Johns Hopkins Hos- 

 pital (Vol. IV, Nos. 4-5, of the Reports) is a very important docu- 

 ment for the working neurologist. The papers are all prepared by Dr. 

 Berkley and, with the exception of the first, comprise practically one 

 continuous investigation. 



I. Dementia Paralytica in the Negro. Five cases are presented, 

 with a plate of histological preparations. 



II. Studies in the Histology of the Liver. The intrinsic nerves 

 of the liver, in the main, present little variation in their course or 

 terminations from the nerve elements of other, already studied glands. 

 The newest, as well as one of the most important additions to our 

 histological knowledge that has been furnished by this study, has been 

 the discovery that the vessels of the portal circulation are furnished 

 with a rich supply of nerve fibres, a circumstance that, however, might 

 have been readily forseen from the physiological experiments of Pal and 

 Mall upon the portal circulation. Next in importance in our study is 

 the influence of the nerves upon the gall canals, it being demonstrated 

 that they probably supply the unstriped muscle of the outer layer of 

 the ducts, and also with great probability enter into the cement sub- 

 stance between the columnar cells lining the canal. Thirdly, that the 

 fibres coming from the walls of the portal veins and hepatic arteries, 

 and passing between the liver cells, are not true nerve fibres as has 

 been supposed by Nesterowsky and others, but belong to the reticu- 



ated tissue system, and that the true nerve endings of the liver do 



