^» Galvanifm. 



fpirit of wine falls no more than three or four. The mercury 

 dil ites from the freezing point to that of boiling water, in the 

 ratio of 5045 to 5122, or of a 65th part of its volume. Mer- 

 cury in a ftate of ebullition in the open air makes the mer- 

 curial thermometer rife to 190 degrees, the barometer being 

 at 28 inches. 



GALVANISM. 



Jadelot has tranflated into French Humboldt's work on 

 galvanifm, to which he has added a great many of his own 

 experiments. The general confequenccs he prefents are as 

 flillows ; 



ift, The effefts of galvanifm arc for the iiioft part different 

 in the different parts of animals. 



3d, The diaphragm, in warm-blooded animals, is that 

 mufcle which, if not irritated moft flrongly, is at leafl irri- 

 tated with the moft readincfsj for it is the only one that al- 

 ways contrafts itfelf with the Q;rcatefl violence in experiments 

 where no chain is formed, but which do not however fuc- 

 ceed unlefs in thofe whofe irritability is greatly exalted. May 

 not this obfervation contribute towards determining the re- 

 fpeftive degrees of the irritability of the difl'crent mufcles ? 

 Thefe experiments attefl: : 



3d, That, as Humboldt has remarked, the living nerves 

 and mufcles are furrounded with an a6live and fcnfible at- 

 mofphere; a condition that, added to the condu6ling pro- 

 perty in which the animal organs participate with all moifl 

 fubffances, fupports the explanation of profefTor Reil rcfpeft- 

 ing the aftion of the nerves, which extends beyond the 

 points vi'here they dil'perfe themfelves. 



4th, That, as Humboldt obferved alfo, galvanifm may 

 excite movements in the organs altogether independent on 

 the will, as in the heart and ftomach. 



5th, That the galvanic fluid, coming from a warm-blooded 

 animal, may aft with efficacy on the nerves of the human 

 body. 



6th, Thjt the galvanic phenomena take place without the 

 intervention of any external body: that, thus, the caufe which 

 produces them rcfidcs in the living animal economy. 



7 th, 



