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J. W. Gibbs — Vapor- Densities. 375 
— is ‘26 and the average ‘085), are not large in view of the 
act that the experiments were undertaken rather with the de- 
sire of obtaining a great number of observations with moderate 
labor, than with the intention of attaining the greatest possible 
accuracy. 
The quantity of acid diminishes somewhat regularly from 
‘2084 grams in series A to ‘0185 in series K. The volume, 
be accounted for by an insufficient exposure to the temperature 
of the experiment. The observations, except those at 78°, 
hegative excess.) In-the observations at 78°, which were the 
last of each series, and therefore followed a fall of temperature 
we Sick § : : 
minations of the same series, and which appears to be referable 
this circumstance. 
