l"lQ OBSERVATIONS ON MURIATIC ACID* 



Muriatic acid - 84« 



Oxigen - - - 16 



1 00, are the proportions 

 which combine to form oxigenized muriatic acid. 

 Confirmation by To corroborate this evidence, I difiilled 100 grains of the. 

 drilling o t e j ntire f a j t ment j one( j a bove ; and obtained nearly 16,5 cubic 



oxigen. m 7 J ' 



inches of oxigen gas ; which as accurately correfponds with 

 tjie trials by nitrate of filver, as can be expected in experiments 

 of this nature. 

 Companion with jy| r# Berthollet, in his memoir upon oxigenized muriatic 

 «f Berthollet ; ac "^ gt ves > if I underftand him rightly, the following ftate- 

 ment of the proportions, and of the means by which he ob- 

 tained his remits. He expofed to the light of the fun, 50 

 cubic inches of water, faturatqd with oxigenized muriatic 

 acid; and collected in the pneumatic tub, 15 cubic inches of 

 oxigen gas. I here neglecl fractions ; becaufe our refults ap- 

 pear, at firft fight, to differ fo widely as not to require great 

 accuracy in giving dieir comparative itatement. He then pre- 

 cipitated, by nitrate of filver, the 50 cubic inches of liquor, 

 which had become fimple muriatic acid, and obtained 383 

 grains of muriate of filver. But, by experiments, I found that 

 383 grains of muriate of filver contain 65 of muriatic acid. 

 Therefore, 65 of muriatic acid combine with 15 cubic inches* 

 (=8 grains) of oxigen, to form 73 of oxigenized muriatic 

 acid. But 73 : .8 : : 100 : 11, or nearly. For this difference, 

 however, it may be eafy to account. Perhaps Mr. Berthol- 

 let\s 50 cubic inches of oxigenized muriatic acid, contained 

 originally a little fimple muriatic acid ; and he fays befides, 

 that he fufpe&s all the oxigen was not difengaged. This in- 

 deed is mod probable; and I am happy that I can reconcile 

 the proportions which I have found, to the opinion of fo fkilful 

 a chemift. 

 andCruick- Mr. Cruickftiank likewife, in his additional Obfervations 



fcank. upon Hydrocarbonates, has ftated that 2,3 parts of oxigenized 



muriatic acid contain 1 of oxigen, or about 43,5 percent. But 

 this able chemift, to whom we are indebted for the difcovery of 

 the gafeous oxide of carbon, procured his oxigenized muriatic 



* Mr. Berthollefs proportions are in the old French weights and 

 meafures. 



acid 



