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ADDITIONAL OBSERVATIONS on the PROPORTION of 

 REAL ACID in /i-e THREE ANTIENT KNOWN MINERAL 

 ACIDS, and on the INGREDIENTS m various NEUTRAL 

 SALTS and other COMPOUNDS. By RICHARD KIRWAN, Efq. 

 L.L.D. F.R.S. and M.R.LA. 



X HE fundamental experiments on which the proportion of real Read i6ih 



acid in the three mineral acids antiently known, and alfo the 

 proprortion of ingredients in many neutral falts, were determined, 

 I have already fet forth in a paper to be found in the IVth Vol. of 

 the Tranfadions of this Academy. In that paper I have inferted 

 tables of the quantity of ftandard acid exifting in loo parts of 

 each of the acid liquors, of given fpecific gravities, and alfo in 

 each of the neutral falts therein mentioned ; the mode of ex- 

 prefling the quantity of acid I had then adopted I fince difcovered 

 to be very inconvenient, as in fome of thefe neutral falts an acid 

 ftill ftronger than the affumed ftandard was found to exift. But 

 I have there alfo noticed that the ftrongeft vitriolic acid now 

 known, exifted in vitriolated tartarin, the ftrongeft nitrous acid 

 in nitrated foda, and the ftrongeft muriatic acid in muriated tartarin j 

 Vol. VII. . . X Acids 



Dec. 1797. 



