149 Institvte of France. 



entirely from a numerous series of experiments devistd and ex- 

 ecuted by myself. The last error is in the name cnrliyox'ic, 

 and in the explanation attached to it. You state that bv this 

 name I proposed to designate the acid contained in the before- 

 mentioned salts : but the real name which I proposed for it was 

 the ferruretted chyazic acid, the word chyazic being composed 

 of the first letters of the elements carbon, /»/drogen, and ozote, 

 with the syllable ic added ; and the word ferruretted implying 

 the iron which it contains, and at the same time distinguishing 

 it from the sulphuretted chyazic acid also discovered by me, 

 and of which a particular account is given in the paper from 

 which your abstract was made. 

 " I am, sir, 



" Your most obedient servant, 

 To Mr. TiUoch. " R. Porrett Jun." 



PUOCEEDINCS OF THE FRENCH INSTITUTE FOR THE YEAR 1813. 

 BY M. CUVIER. 



[Concluded from p. 6.?.] 



Two years ago we noticed the experiments of M. Lechenault 

 en the deleterious effects of the juice known at .lava by the 

 name of %ipa$, when introduced iivto wounds, as well as those 

 of Messrs. Delille and iNIagendie, which tend to prove that it 

 is essentially on tlie spinal marrow that this poison acts. 



Having been frequently witnesses of the frightful rapidity of 

 its action, Messrs. Delille and Magendie were tempted to douiot 

 that it could have been transported so quickly into the mar- 

 row by the tortuous and intricate way of the hmphatics ; and 

 they inquired if we ought not to admit, at least in certain cases, 

 the absorbent faculty generally ascribed to the veins v\'hen we 

 were not so well acquainted with all the ramifications of the 

 lymjjhatic system. In order to come to some conclusion in this 

 respect, they applied the upas to parts which adhered to the 

 animal body by blood-vessels onlv ; for example, thev cut off all 

 the mesentefry adhering to the intestine of a goose, leaving only 

 the arteries and veins ; and after having placed the ui)as in tlie 

 interior of this goose, they cut it and tied both ends : nay, what 

 appears still more conclusive, they cut a tiiigh leaving the vein 

 and artery only entire, and afterwards applied poison to the foot : 

 iiuallv,in order to remove even the objection of invisible lymphatic 

 vessels, which might have belonged to the texture of these two 

 blood-vessels, they removed a segment of both, after having sup- 

 plied their place v/ith quills, so that there was no longer any 

 commuuication betvveeii the member and the animal, than by 



the 



