REPORT ON A MEMOIR. J'gg 



with which the atmofphere muft be necefTarily fupplied to keep 

 pace with the confumption, and alfo why it is only found in 

 one invariable proportion. 



VII. 



Report on a Memoir * fent to la Societc Libre des Pharmaciens, 

 of Paris. By Cit. Robert, Chief Phyficianto the Hofpital 

 Of Humanity, at Rouen. By f Citizens C. L. Cadet and 

 Boullay. 



'OITIZEN ROBERT recounts the different experiments Introductory 

 made by Citizens Fourcroy and Vauquelin, on the erTeds f obfervations. 

 fur-oxigenated muriate of potafli united to certain combuftible 

 bodies, and fubmitted to the action of a blow or friction ; thefe 

 brilliant detonations are now known to all chemifts; they are 

 equally well informed of the inflammations which take place 

 when the fame bodies are plunged into concentrated fulphuric 

 acid. Cit. Robert has modified the latter experiments in an 

 interefting manner. • Inltead of throwing the inflammable mix- cit. Robert's 

 tures into the acid, he only touches them with a tube wetted experiments, 

 with this acid. In this manner he inflamed, 



lft. Three parts of the fur-oxigenated muriate, and one 

 part of fulphur. 



2d. Three parts of the fame fait, half a part of charcoal, 

 and as much fulphur. 



3d. Equal parts of antimony and fur-oxigenated muriate. 



4th. Equal parts of fulphuret of antimony and of the fait. 



5th. Equal parts of kermes and golden fulphur (and the 

 fait.) 



6th. Equal parts of arfenic and the fait. 



7th. Three parts of the muriate and one of fugar. 



8th. Three parts of the muriate and one of charcoal. 



9th. A part and a half of the muriate and three parts of 

 gunpowder. 



* The fubjecT: of the Memoir itfelf is the inflammation of com- 

 buftible bodies combined with fur-oxigenated muriate of potam, by 

 contact with fulphuric apd. C Ss B. 



t From the Annales ae Chimie, Frimaire, An, XI. 



And 



