26 iiurxji.:: 



both ways in the \u-r\v IHht. of wliicli ii .s. /,/,,/// fnrins 

 tho wliolo of the axis {•^iiiidtr. 



5. Two cases of doubh' Ht- have l)ci'ii rmiiKl. 



Ii. Two colls, in a nuiuluT of casos, have been found 

 to unite their processes, not necessarily as a cell junc- 

 tion, but to aid in inakin<^ the axis cylinder of the 

 same nerve fiber. 



No rigor has been spared in this teasing from fear 

 of breaking specimens. The coverslip has been tapped 

 and each specbnen rolled over and over while under 

 the microscope until every point in the above descrip- 

 tion has been clearly demonstrated. A special inves- 

 tigation of these points is under way. 



In the course of examining so many cells, an appear- 

 ance of the nucleus has been noticed which may 

 throw some light upon that most vexed problem, 

 the minute structure of the ganglion cell itself. The 

 marked effect upon the nucleus of stimulation would 

 indicate an intimate relation between the nerve fiber 

 and the nucleus. In general, the jagged points of a 

 worked nucleus give the impression that it is connected 

 at these points with the fibrillar reticulum of the cell 

 protoplasm. At times, and not so very rarely, some- 

 thing more definite makes its appearance. A stream 

 of fibrils is plainly seen to pass from one side of the 

 nucleus to mingle with the fibrils of the cell. These 

 fibrils arise from the nuclear membrane, and in no 

 case have I been able to trace them to an origin within 

 the nucleus. 



Marcfi 15, 1889. 



(For explaniition of jilato see page 27). 



