On Gahanifm. 319 



Twice the fine of half the vertical angle of the wedge, 



The radius, 



The fine of the angle contained by the fides of the wedge 

 and clefc, 



And the co-fine of that angle. Hence the propofition is 

 manifeft. 



XVIII. Report of the Commijfioners appointed by the National In- 

 Jlitute to repeat the Experiments -which have been made on Gal- 

 vanifm : read in the Name of the Commijfion by Cit. Halle. 

 From the Bulletin des Sciences, par la Societe Philoma- 

 thique, Thermidor, An VI. 



X HE commifiion was not fatisfied with repeating a great 

 part of the experiments already made : they clafled them, 

 and rendered them complete by the addition of others which 

 were wanting. 



I. The phenomenon of Galyanifm, taken in general, is as 

 follows : A communication is eftablifhed between two points 

 of a feries of nervous or mufcular organs by means of certain 

 determined fubftances. At the moment when this commu- 

 nication is made, there "take phce in the ftate of the organs 

 changes, the nature of which is ftill unknown ; but which 

 are manifefted by fenfations more or lefs lively, or contrac- 

 tions more or lefs violent. Thefe mufcular contractions 

 take place even in feparated parts of the body, and with as 

 much force as when produced by the mod crFec"lual means 

 of irritation. The feries of mufcular or nervous organs is 

 called the animal arc ; the other fubftances form the exciting 

 arc. The compofition of both may be varied many different 

 ways. 



II. Among the efFedts refulting from the different compe- 

 titions of the animal arc, the following are the moft remarka- 

 ble : A ligature made on a nerve does not intercept Galvamfm, 

 unkfs it be made in the part furrounded with flefh. If the 



nerve 



