French National Injiitute. jqi 



that known among the human fpecies under the name of the 

 catalepfy. 



An ofleous tumour which arofe in the ham of a horfe, gave 

 occafion to Citizen Huzard to make fome refleftions on the 

 origin of that malady, and the means of curing it, when it is 

 treated according to its principle. 



Citizen Lelievre announced that he had lately difcovered 

 in France fulphate of Jlrontian in a ftriated mafs. It was 

 found, at the depth of 15 or 1 6 feet, in a clay pit {glaiftere), 

 which has been worked for fome years, at Bouvron, near 

 Toul. 



Citizen Dolomieu fhewed fome of the fulphate ofjlrontlan* 

 which he had brought with him from Sicily, and which, as 

 well as the preceding, had been analyfed by Citizen Vau- 

 quelin. 



It is well known that the nitro-muriatic acid is the true 

 folvent of gold, and that this metal may be recovered from 

 its folution by fulphuric ether. Citizen Sage (hewed a gold 

 precipitate fufpended between the ether and the nitro-mu- 

 riatic acid, under the form of fmall threads or flakes, and at 

 the bottom of the flafk, in little brilliant maffes, on which 

 were obferved triangular lamellae, the elements of the cryf- 

 tallization of that metal. 



Citizen Chaptal read a memoir on a new mode of manu- 

 faauring verdigrife. This new procefs, pradifed at Mont- 

 pellier for fome years pad, confifts in caufing the refidue 

 (marc) of grapes to ferment, and of putting it in layers be- 

 tween plates of copper, to develop the metallic oxyd, called 

 verdigrife. —This method is fuperior to the old one, as it is 

 much eafier, and attended with lefs expence, becaufe it re- 

 quires no wine. 



Some experiments of the fame chemift prove alfo that 

 white lead may be made in the fame manner. 



The fame chemift read another memoir on the acetite 



of copper, or diftilled verdigrife. He gave an account of 



Several experiments to oxydate copper with more advan- 



H 3 tage, 



