TRANSACTIONS OF SECTION I. 647 
restiform body. Hoche,! Schaffer,? and Purves Stewart? in man found 
distinct degeneration above the level of these nuclei in the internal and 
external arcuate fibres of the medulla. Mott* and Sherrington ° found no 
such fibres in the monkey, and in the cat no trace of any are to be seen. 
Dydynski ° states that some fibres from the dorsal columns pass direct through 
the corpora restiformi to the cerebellum. This is not in agreement with my 
observations in the cat. All the fibres that reach the bulb terminate in the 
nuclei of the posterior columns. 
In every case there is a symmetrical though much less intense degenera- 
tion in the corresponding column of the opposite side, but this is due, in all 
probability, to some incidental injury to the cord or nerve roots during or 
subsequent to the operation, since a slight degeneration is also found in the 
dorsal cerebellar, and, to a less extent, in the ventral cerebellar tracts on buth 
sides. No long fibres can be traced across the middle line from the posterior 
column on the side of the lesion to that of the other side, although some are 
found passing into the grey matter of the opposite side through the posterior 
grey commissure for a few segments above the lesion and many end in 
Clarke’s column of the same side. 
In the experiment where the fifth lumbar root alone was divided a well- 
defined area of degeneration is present in the position of the dorsal cere- 
bellar tract lateral to the entering dorsal root. This can be traced to the 
cerebellum through the restiform body, but the number of fibres gradually 
diminishes cephalicwards and only comparatively few reach the cerebellum. 
Those that disappear in the cord represent proprio-spinal fibres, some of 
which extend from the lower part of the lumbar region to the upper part of 
the cervical region. In the cat, therefore, some fibres of the dorsal cerebellar 
tract take origin as far caudalwards as the fifth lumbar segment, and it may 
be farther. The fibres in question maintain their position close to the 
posterior root and the degeneration is not due to the fibres of Gower’s bundle 
finding their way into Flechsig’s bundle,’ since in this specimen no 
degeneration exists in Gower’s tract at any level. 
The degeneration from the seventh cervical posterior root was followed to 
the upper limit of the nucleus cuneatus but no farther. 
6. On the Natural Secretion of the Adrenal Bodies. 
By Dr. F. A. Youna. 
The elimination of suprarenal activity was attempted te placing liga- 
tures about the vessels to and from the suprarenal capsules. The circulation 
was thus obstructed for from one to five hours while the blood pressure was 
recorded in six experiments on dogs. 
Practically no fall in the pressure was occasioned. 
7. The Opposite Electrotaxis of Animal and Vegetable Cells. 
By Professor W. M. Tuornton, D.Sc. 
Some years ago (August 1904), whilst examining the influence of an 
electric field on small elongated bodies suspended in liquids, the author 
tried diatoms. These orientate quickly under the influence of alternating 
* Hoche, Archiv f. Psych. u. Nervenkr. Bd. 28, 1896, S. 510. 
? Schaffer, Arch. f. Mikros. Anat. Bd. 43, S. 242. 
* Purves Stewart, es vol. 24, 1901, p. 222. 
* Mott, Brain, 1895, 
- Sherrington, Jour. OF Physiol., 1893, p. 255, 
® Dydynski, Neurol. Cent., 1903, 8. 898. 
7 Schafer and Ninian Bruce, Jour. Physiol. Proc., vol. 35, p. xlix. 
