^ 



AC«TIC ACJD, 



the gold one, a little hydrogen gas was produced} evec when 

 the potafli was mixed with the diftilled water, though there 

 was none when it was a gold wire. 



I hope Mr. Nicholfon you will not refufe the hifertion. of 

 thefe intereftlng faSs in your journal, for I have made the 

 relation of them as brief as poffible that they might not Qccu|>y 

 too much room *. 



H. B. K, 

 London, Auguji 15. 



IX. 



Jleport nf M. Debuc's Menioir on Acetic Acid, made byM. M. 

 Plan CHE and Boullav, It^ Order of the Societj/ of Phar^^ 

 macrf at Paris f . 



M. Debuc r«- iVl, Debuc faw in the Amahs de Ckimie, No. 1 09, a method of 



d^ikr's proceik ^^' Badollier, apothecary atChartres, for obtaining acetic licid 



to obtain acetic very readily from a mixture of equal parts of fulphate of capper 



4cW from ace. ^^^ ^^.^j^^^ ^^ j^^^ , ^ moderate heat. 



tate or iead by •' 



fuiphateof cop- Relying on this procels M. Debuc made an exact mixture 



P^""* of two pounds of fulphate of copper and an equal quantity of 



acetate of lead, which he expofed m adiftilling apparatus on a 



fand bath to a moderate {ue, which he increafed by degrees 



The produa during the operation, which lafted for fix hours : the produS 



ufed in manu- obtained was 26 ounces. It was given to a manufa€ltirer, 



an cffeft con- without examination, and being ufed in his bufinefs produced 



trary to the _ an effed entirely contrary to the acid extraQed from cryftals of 



common acetic 



^cid. copper. 



The procefs This circumflance determined M. Debuc to repeat the pro- 



again repeated, cefs as before, and examine its refults carefully : In which he 



carefully exa- obferved the mixture of the two falts to become paftey, which 



mined* is eafily explained by the difference of the concentration of 



the acid in the fulphate of copper, from that in the fulphate of 



fead. The produdls of this experiment wete, 



* I am extremely forry that this communication was by naiftake- 

 placed among papers already printed ; which alone has caufed the 

 delay in its appearance. — W. N. 



f Annalcs de Chimie, Tom. LIV. p. 145, 



l.Four 



