and naphthaline , and on a new acid produced. 161 
repeat the analyses which have been made of naphthaline, 
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 0.135 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 
