TRANSACTIONS OF THE SECTIONS. 127 



blended with another agreeable to the animal. The dog ate with equal avi- 

 dity fresh animal food, or that rendered bitter by the same substance. A 

 morsel of flesh pounded minutely in coloquintiva solution he eat, and even 

 licked the rest of the fluid in the vessel.' — ' At the same time (continues 

 Panizza) I experimented upon another dog, in which I had cut off the 

 two lingual nerves (branches of the fifth pair), and after swallowing 

 morsels of flesh with avidity, he swallowed an embittered portion also ; 

 but it was scarcely in the gullet when he was attacked with vomiting, 

 and obliged to disgorge it : when it was presented to the dog in which 

 the glosso-pharyngeal nerve was divided on each side, he ate it imme- 

 diately without any sign of disgust.' 



" With respect to the anatomical distribution of the glosso-pharyn- 

 geal nerve, the professor says, ' In man, the dog, &c., it is wholly dis- 

 tributed to the mucous membrane of the tongue, and the other parts 

 which have the sense of taste in common Math the tongue, and towards 

 the base of the tongue, where the nerves are most numerous and the 

 sense of taste is most acute.' 



" Not doubting the accuracy of these observations, we were neverthe- 

 less desirous of communicating to the Section at the present Meeting 

 our repetition of Panizza's experiment on the glosso-pharyngeal nerve 

 and its results, which are quite in accordance with thoae of the Italian 

 jKofessor, and thus render our original task more complete. The ex- 

 periment was conducted with great care and caution in the dissecting 

 rooms of our talented and skilful friend Mr. Lane of Grosvenor Place, 

 to whose hands, as an independent party, was consigned the necessary 

 operation. 



" Previously to the experiment, accurate dissections and surveys M'ere 

 made of the parts concerned in the intricate distribution of the nerves 

 about the throat. A small dog of the terrier breed was preferred, with 

 a long and lanky neck, one central incision sufficing for both nerves : 

 the glosso-pharyngeal nerve was divided on each side, and a piece cut 

 out of about ^ of an inch long. No attempt was on this occasion made 

 to prove the sensibility of this nerve to pain, as this cannot be so well 

 effected in a dog as in a horse or an ass, the latter having (in our ori- 

 ginal experiments) been allowed to stand up unconstrained after the 

 exposure of the nerve, so that any feeling experienced on irritating the 

 nerve might be freely expressed ; the struggles of an animal held down 

 forcibly being likely to embarrass the observations made. 



" As soon as the dog had recovered from the necessary exhaustion of 

 its situation, a piece of meat rubbed over with aloes was offered to it, 

 lohich it ate, and it lapped water as usual. The next evening we re-as- 

 sembled, and offered the dog fresh meat, which it eagerly ate. The next 

 morsel offered was rubbed over with a strong solution of the extract of 

 colocynth, which he snapped up, but instantly ejected from the mouth, 

 took it up again, and swallowed it with a little hesitation. Although 

 the odour of the extract is very slight, we resolved on the next occasion 

 to use the coloquintida powder, which is quite ft-ee from odour, and 

 also the quinine. A second similarly embittered morsel was however 

 offered the dog, which he ate unhesitatingly ; a third morsel was smelt 



