and naphthaline y and on a new acid produced. 161 



repeat the analyses which have been made of naphthahne, 

 and which would throw light upon the question. Such a 

 view would account for a part of the overplus in weight, but 

 not for the excess of the sulphuric acid obtained, above two 

 proportionals. 



The glowing salt of baryta was now analysed by a process 

 similar to that adopted for the flaming salt. The specimen 

 operated upon was pure, and in a distinctly crystalline state. 

 It had been heated to about 440° F. for three hours in a 

 metallic bath. Ten grains of this salt exposed to air for 40 

 hours increased only 0.08 of a grain in weight. These when 

 converted into sulphate of baryta by heat and sulphuric acid, 

 gave 4.24 grains. Seven grains by carbonate of baryta, 

 oxide of copper, heat, &c. gave 6.02 grains of sulphate of 

 baryta : hence 10 grains of the salt would have afforded 8.6 

 grains of the sulphate equivalent to 2.915 grains of sulphuric 

 acid. Five grains when heated with oxide of copper gave 

 16.68 cubic inches of carbonic acid gas, equal to 7.772 grains, 

 and equivalent to 2.12 grains of carbon. The water formed 

 amounted to 1.2 grains equivalent to 0.133 of a grain of 

 hydrogen. 



From these data, 100 grains of the salt would appear to 

 furnish 



Baryta - 28.03 - 78 or 1 proportional. 



Sulphuric acid 29.13 - 81.41 nearly two proportionals. 



Carbon - 42.40 - 118. approaching to 20 ditto. 



Hydrogen 2.66 - 7.4 or 7.4 proportionals. 



102.22 



results not far different from those obtained with the former 

 salt. 



MDCCCXXVI. Y 



