175 



the operation in question, are found to have exhibited it in a greater 

 or less degree; and the frequency of its occurrence has been singu- 

 larly overlooked by practical surgeons. Two cases have been for- 

 warded to the committee by Dr. Mettauer, of Virginia, in which it 

 was observed : in these the vessels were taken up, in one instance, 

 for an anastomosing aneurism of the antrum and nasal cavities, and 

 in the other for the cure of a false aneurism. Both patients had 

 lost large quantities of blood previous to the operations. In each 

 case partial hemiplegia of the opposite side to the artery which was 

 ligatured, was noticed in a few hours, and was followed by delirium 

 and convulsions. In one of the instances, death occurred on the 

 8th, and in the other on the 10th day. 



Autopsic examinations showed softening of the medullary substance 

 on the side opposite to that on which the vessel was tied, while the 

 hemisphere corresponding to it was healthy, though pale and blood- 

 less. 



