16 DR. BEALE, ON NERVE+FIBRES, 
believes have now been demonstrated for the first time in his 
specimens, are true nerve-fibres, is placed beyond all question 
by the fact of their being continuous with ganglion-cells. He 
has seen several ganglion-cells from which such fine fibres alone 
(every one being less than the =,,1,,th of an inch) proceed. 
From different parts of one ganglion-cell sometimes six or seven 
or more very fine fibres may be traced, while not a single dark- 
bordered fibre comes near to the cell or bundle of fibres under 
consideration. 
Dr. Beale fears that the accuracy of these observations will 
be questioned by many fellow-workers in Germany, and more 
especially by those of the Dorpat school, and the difficulty of 
preparing the specimens is so great, that his conclusions are 
scarcely likely to be confirmed for some time to come. The 
appearances are, however, so distinct that he has been able to 
demonstrate the most important points to the students of his 
physiological class. As the specimens will keep for a consider- 
able length of time, they can be examined by any one desirous 
of seeing them. 
It would seem then that in the frog these fine fibres are 
distributed to capillary vessels, to fibrous tissues devoid of 
capillaries, to the tongue and palate, to the unstriped mus- 
cle of the bladder, pharynx, gullet, stomach, and intestines, 
to the unstriped muscle distributed to the coats of arteries, 
and to the muscular fibres of the heart, and probably they 
are to be made out in many other tissues than those above 
named. 
The author is unable to enter fully into the question of the 
distribution of the different classes of nerve-fibres to the 
various tissues of the frog’s bladder, nor can he discuss satis- 
factorily their several offices; but on these important ques- 
tions he offers the following remarks :— 
With reference to the kind of nerve-fibres, it is certain 
that— 
1. Dark-bordered fibres are distributed to the bladder of 
the frog, and that the very fine terminal fibres, resulting from 
the subdivision of these, are freely distributed with the ulti- 
mate branches of other nerve-fibres. 
2. That there are fine fibres running in the same sheath with 
the dark-bordered nerve-fibres, as he has described in the case 
of dark-bordered fibres distributed exclusively to voluntary 
muscle. See‘ Archives,’ vol. iti, and ‘ Phil. Trans.,’ 1862 
(just published). 
3. That there are verymany bundles of very fine fibres which 
sometimes run with dark-bordered fibres, and sometimes also 
form special trunks destitute of dark-bordered fibres. 
