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been performed, removal of the superior cervical ganglion the most 

 rapidly and strongly produces diabetes. After the removal of one 

 ganglion, the urine has been found intensely saccharine in an hour's 

 time, and the saccharine character has remained during the following 

 day, but has disappeared by the next. Subsequent removal of the 

 other ganglion a few days later has been followed in half an hour's 

 time with a strongly marked diabetic effect, which, however, has 

 been again only of a temporary nature. 



" Division of the sympathetic in the chest has been several times 

 succeeded by saccharine urine. In one case after division on one 

 side only, the urine was intensely saccharine in half an hour's time. 

 On the other hand, many experiments have been made where both 

 sides have been operated on, and only a merely traceable, or in a 

 few instances, even no effect, has been noticeable. 



" In the rabbit, removal of the superior cervical ganglia, when 

 the animal is in a strong and healthy state, is followed by diabetes; 

 but the effect is not so rapidly produced as in the dog. It has been 

 noticed at the end of four hours after the operation, and has been 

 observed to exist until the following day. 



" Excision of the superior cervical ganglia in the rabbit with a 

 division of the pneumogastrics above their gangliform enlargement 

 close to their exit from the skull, has been attended with the produc- 

 tion of saccharine urine in a shorter space of time than when the 

 ganglia alone have been removed, notwithstanding that division of 

 the pneumogastrics in the situation referred to, has not been seen by 

 itself to cause any positive effect." 



Such is a simple statement of the principal conclusions derivable 

 from the author's experiments, which are given in detail in his com- 

 munication. As to the interpretation of the results that have been 

 obtained, this he leaves for further investigation, in which he is now 

 engaged, if possible, to disclose. The experiments on the sympathetic 

 were commenced under the notion that it might form the medium of 

 transmission of nervous force from the medulla oblongata to the liver. 

 From this supposition certain facts have been discovered which are 

 left for the present, without discussing whether the notion that led 

 to them is right or wrong. 



