104 DR. BEALE, ON NERVE-FIBRES AND CELLS. 
yous very fine fibres. Vessels injected with Prussian blue. 
x 215. 
Prep. 19.—Shows the manner in which the dark-bordered 
nerve-fibres branch on the surface of the elementary fibres of 
muscles. Some fibres are seen dividing dichotomously, and 
others into three or four branches. x 215. 
Prep. 20.—A Pacinian corpuscle from the mesentery of a 
cat, showing the pale nerve-fibre at the centre. x 130. 
Prep. 21.—Small piece of the skin of a frog, showing some 
large bundles of nerve-fibres ramifying upon its under sur- 
face. x 1380. 
Prep. 22.—Shows a small artery with bundles of nerve- 
fibres in the skin of the frog. The network formed by the 
different bundles is clearly seen. x 215. 
Prep. 23.—Skin of the mouse, showing hair-bulbs, sebaceous 
glands, connective-tissue-corpuscles, and nerve-fibres. |The 
coarse nervous network, and the fine network around the 
hair-bulbs are plainly demonstrated. x 215. 
Prep. 24.—Shows nerve-fibres and capillaries, with their 
nuclei distributed to the peritoneum of the frog. The net- 
work formed by the different bundles of nerve-fibres is dis- 
tinctly seen. x 130. 
Prep. 25.—Another specimen from the peritoneum of the 
frog, showing a bundle of fine nerve-fibres, with one dark- 
bordered fibre, which divides. The dark-bordered fibre is 
observed continuing onward as a bundle of very fine fibres. 
Here are no separate pale fibres. Capillaries injected blue. 
x 215. 
Prep. 26.—Shows the ultimate distribution of the nerves 
to the cornea of the frog. Not one dark-bordered fibre can 
be observed. The nerves, after dividing and subdividing, 
form a network of very fine fibres. The relation of the nerve- 
fibres to the cornea-corpuscles is clearly shown. The nerve- 
fibres always maintain their individuality at the periphery, 
and never lose themselvesin the corneal-corpuscles or any other 
tissue. X 215. 
Prep. 27.._Shows several bundles of very fine, pale fibres, 
distributed to the bladder of the frog. The bundles are seen 
repeatedly dividing, and at last forming a network which lies 
on different planes. Bundles of muscular fibre-cells are also 
observed interlacing with one another. Some of the nuclei 
of the muscular fibre-cells exhibit a triangular form, and the 
contractile tissue passes off in three directions. x 550. 
Prep. 28.—Another specimen from the bladder of the frog, 
showing the termination of the dark-bordered nerve-fibres 
in very fine fibres, which form a network which ramifies 
