4815.)  Gaséous Bodies and the Weight of their Atoms. 82 
weight of the atom of potash, and 60 — 10 = 50, the weight of 
the atom of potassium. Hence a volume of it ina state of gas will 
weigh 2°7777, or exactly 40 times as much as hydrogen. 
10. Barytium.—100 gyrs. of the same dilute acid dissolved exactly 
as much again of carbonate of barytes as of carbonate of lime. 
Hence the weight of the atom of carbonate of barytes is 125; and 
125 — 27°5 = 97°5, the weight of the atom of barytes, and 97°5 
— 10 = 87:5, the weight of the atom of barytium. The sp. gr. 
therefore, of a volume of its gas will be 4°8611, or exactly 70 
times that of hydrogen. 
With respect to the above experiments, I may add, that they 
were made with the greatest possible attention to accuracy, and 
most of them were many times repeated with almost precisely the 
same results. 
The following tables exhibit a general view of the above results, 
and at the same time the proportions, both in volume and weight, 
in which they unite with oxygen and hydrogen: also the weights of 
other substances, which have not been rigidly examined, are here 
atated from analogy. 
ry 
