Br. U^all on the Origin^ ^c. 67 



both applied to Orichalcum by the ancients; 

 but I would be underftood to fubmit this con- 

 jefture, with great deference, to thofe who are 

 much better Ikilled, than I am, in etymological 

 refearches. 



■wuMMm 



Remarks on the Ok\g\^ o//y?7i? Vegetable Fixed 

 Alkali, with feme collateral Observations 

 on Nitre. By M. Wall, M. D. PraleElor in 

 Chemifiry^ in the Univerfity of Oxford. Commu- 

 nicatcd in a Letter to Dr. Percival, Read 

 November 19, 1783. 



OXON, OCTOBER i, 1723. 



'~r"HE extenfive employment of the/ Vegeta- 

 -^ ble Alkali and Nitre in many of the prin- 

 cipal operations of Chemiilry, renders every in- 

 quiry into their origin and properties, not fimply 

 amufing, but intercfting in a very high degree 

 to every lover of this fcience, and to every one 

 engaged in the arts dependent upon it. It is 

 not, however, with the pretenfion of advanciiig 

 any thing perfectly new, that I have prefumed 

 10 offer the following remarks to the confider- 

 ation of the Society. My hopes will be fully 

 anfwcred, if 1 fhould turn the thoughts of any 

 of thr.fe ingenious Gentlemen, who have done 



F 2 me 



