1894.] Degenerations in the Brain and Spinal Cord, $c. 269 



These results will, I think, be considered sufficiently remarkable by 

 metallurgists who have been accustomed to deal with castings of 

 standard silver. It must not be supposed, however, that liquation 

 has been entirely prevented ; it has, however, practically disappeared. 



The excellent results now submitted to the Society have been ob- 

 tained by limiting the possibilities of re-arrangement as much as may 

 be, and by ensuring that the conditions of cooling shall be as uniform 

 as possible. The need of obtaining uniform alloys is met with in 

 other branches of industry than those which involve the use of silver- 

 copper alloys, so that the conclusions to which the present experiments 

 point are somewhat far-reaching. 



V. " A Contribution to the Study of Descending Degene- 

 rations in the Brain and Spinal Cord, and of the Seat of 

 Origin and Paths of Conduction of the Fits in Absinthe 

 Epilepsy." By HUBERT BOTCE, M.B., Assistant Professor of 

 Pathology, University College, London. Communicated 

 by Professor V. HORSLEY, F.R.S. Received February 8, 

 1894. 



(From the Pathological Laboratory of University College, London.) 

 (Abstract.) 



For the purposes of this research, the following are the experi- 

 lents which have been performed in the cat : 



I. Lesions after which Animal was Kept Alive. 



1. Removal of one complete cerebral hemisphere in 40 cats. 



2. Removal of motor area only in 4 cats. 



3. Division of the crus cerebri in 2 cats. 



4. Removal of a lobe of the cerebellum in 10 cats. 



5. Hemisection of the spinal cord in 4 cats. 



6. Complete section of the spinal cord in 2 cats. 



II. Lesions after which Animals were not Kept Alive for any Length 



of Time. 



1. The preceding operations. 



2. Removal of both cerebral hemispheres. 



3. Removal of the cerebellum. 



4. Removal of one cerebral hemisphere and opposite lobe of cere- 



bellum and vice versa. 



5. Removal of one hemisphere and division of opposite half of the 



spinal cord. 



