1^5 On the Quantily oj Add of Sugar 



falphur remain at the bottom of the matrafs under the form 

 of a white powder, which fometiiues retains a little iron. 



Having reduced the yellow copper ore with three parts of 

 black flux and a fifth of charcoal, it produced per quintal 

 thirty pounds of friable copper, in part fubjetl to be atlraActl 

 by the magnet. It appears by this reduction that the ore 

 viclds per quintal. 



Copper - - 40 



Iron - - 40 



Sulphur - - ao 



It is the fixed alkali of the black flux which diffblvcs the 



copper; fo that if the reduftion of this metal were attempted 



without adding charcoal, there would be danger of not ob- 



tainino- the button. 



Vin. Method of determlnhig the Quantitj' of Acid of Sugar 

 contained ifi Spirit of J Vine, By B. G. Sage, Dire^or 

 of the firfl School of Mines *. 



RBAN HIERNE, a Swcdifli chcniifl, firfl fliowed, that 

 ■when fpirit of wine is decompofed by nitrous acid, a fait is 

 obtained as refiduum on cooling. It was refcrvcd, however, 

 for Schecle to make known that this fait is of the fame na- 

 ture as the acid of fugarf. 



I long confidcrcd fpirit of wine J as an acid foap, fince the 

 ether and the oil of wine which compofc it, are mifcible with 

 water. The acid of fugar is the medium of union, and is 

 found in it in a pretty confiderable proportion. I was not 



* From thf Journal di: Fhyfiqiie, Prairial, an. S. 



-f- The acid of fugar is known in the new nomenclature under the name 

 t>i oxnlic acid, but why not fpeak French ? Why not leave it the name of 

 ac:d of fugar, fince ii is in that fait that this acid is moft abundant, as 

 fixteen parts of fugar produce ton parts of concrete acid ? 



J Reftifitd fpirit of wine is called, but improperly, by the ncologift 

 chcmifts, alcohol. This term, fays the diftionary of TrcTOUx, is derived 

 from the Arabic word kol, which fignifies to render fubtle, to diminiih^ 

 to reduce to an impalpable powder. It cannot therefore be applicable but 

 %o folid bodies. Philofophers ouijht to employ in their language more 

 precifion and corr«<Sln,tfs. 



abicj^ 



