Dr. Ure oii Muriatic Acid, &c. 



28 



of silver are equivalent to 33.5 of the acid gas. The first num- 

 ber makes the quantity of muriatic gas, in 100 parts of acid of 

 1.21, to be only 40.5; the second, 40.77; the third, 40.83, 

 while the number in their table is 42.43. In like manner, when 

 I attempted to get very nice results by weighing the chloride of 

 silver, I found a perceptible and fluctuating deficiency. 



From the excellent accordance which exists between Sir H. 

 and Mr. E. Davy's experiments on the direct combination of 

 the acid gas and water, and my result drawn from the silver 

 equivalent, I shall consider that 1 00 grains of acid, specific 

 gravity 1.20, contain 39.675 of chlorine. That acid was mixed 

 with distilled water in successive proportions, and the mixtures 

 being placed in well-stopped phials, and agitated, were left to 

 cool to 60° Fahr. Their specific gravities were then taken with 

 every requisite care. 



The following table is the result of these experiments. The 

 densities marked with an asterisk are experimental, the rest are 

 interpolated ; but the latter are, I believe, as well as the for- 

 mer, entitled to the entire confidence of practical chemists. 



Table of Muriatic Acid. 



