290 



Dr. Ure on Muriatic Arid, Ike. 



At the density 1.199, Mr. Dalton's table* has 25.6 per cent. 

 of real muriatic acid by weight, equivalent to only 32.9 chlorine, 

 instead of 39.47, which I believe to be the exact value. If we 

 term the correct quantity 100, then Mr. Dalton's number would 

 be only 83 ; which is no less than 17 per cent, of defect from the 

 truth. I have purposely omitted in this new table the column of 

 dry, or, as it was also called, real muriatic acid; first, because 

 there is no evidence at present of the existence of any such body ; 



* JVew System of Chemical Philosophy, ii. p. 395. 



