OF NERVES DISTRIBUTED TO THE CAPILLARIES. 307 



of the "Quarterly Journal of Microscopical Science." 

 His specimens were prepared by tlie gold process, and 

 give a different idea of the arrangement of the nerves 

 to that afforded by mine, some of which are ten 

 years old. I propose to restrict myself in this place 

 to the description of the facts I have succeeded in 

 demonstrating. Dr. Klein's memoir may be con- 

 sulted by referring to the " Quarterly Journal of 

 Microscopical Science," January, 1872, while mine, 

 from which the following paragraphs have been 

 extracted, was published in the " Monthly Micro- 

 scopical Journal " of the same date. 



My own conclusions on the ultimate distribution of 

 nerve- fibres were formed several years ago, at a time 

 when terminal nerve networks were denied in Ger- 

 many, and when it was supposed that only in a few 

 exceptional cases did the axis cylinder of a nerve 

 extend beyond the white substance. Not only are 

 my networks of pale nucleated nerve -fibres now 

 accepted, but it is maintained that much finer net- 

 works of nerve-fibres ramifying upon and amongst 

 epithelial cells and other elementary parts, and even 

 upon an individual mass of bioplasm (nucleus), have 

 been demonstrated. At present, however, I cannot 

 regard the observations upon which it is desired to 

 establish this view, more conclusive than those which 

 a few years since led many to the conclusion that the 

 axis cylinder sprang from the nucleus or nucleolus of 

 the central nerve-cell. 



I have demonstrated that nerve-fibres are distri- 

 buted to capillary vessels in almost all the tissues of 

 the frog and newt. Among these textures I would 

 particularly mention the skin and mucous membranes, 

 lung and kidney, the pericardium and fibrous membrane 

 near the liver, and the mesentery, as well as muscle and 

 nerve. 



The nerves distributed to capillary vessels are 

 much more difficult to demonstrate in mammalia, but 



