ight 
in this upper part of the thermometric scale shall‘have been ee 
ciently extended and accumulated, to apply hiinself to the group= 
ing of all three divisions in one comprehensive expression ; and, 
from his well known character, much may be expected, original 
and appropriate. In the mean time, it would be premature to en- ‘ 
ter here upon any discussion of what is only provisional. 
sag resume, then, in conclusion of this rather protracted Me- 
ir; it seems to me that in the various combinations and com=~ 
bariebth that have been given, the claim of the formula I propose 
18 teasonably well established—not to be an expression of a law 
of nature, fo it makes no pee but to reprée= 
‘sent the phenomena of reciprocal p nd temperatures ne 
ctly and with a more extensive std "tHe any that has 
een Poffered and ‘that, in so far, it is worthy of being ‘ater as 
paramount to all that have preceded it. dw far, in view of the 
discord yet existing between experimental results ‘of the most Te=! 
‘cent and reliable observers, it is fit to come in as a substitute for 
‘any and all of those results themselves, is not of course forme” 
a determine. I shall only allow myself to notice, then, its re-’ 
“markable simplicity, and the consequent facility with which it 
adapts itself to calculation, either with or without logarithms; 
well as the readiness with: which, from its elements and form, 
a So ee itself at times to the memory. One important use 
a, it is to be observed, is in enabling an enquirer in 
“ athgareeh case, twig from books and tables, to extemporize 
1 accurate result ; in proportion to its complexity and arbitrari- 
ni, it t becomes a question of individual strength of mem- 
id its resort more and more limited. In the present instance, 
rms are either given in the very case to be solved, or are 
cal constants at the foundation of the theory of Heat; whieh, 
yen say, it is impossible forrone, ordinarily well informed » 
If my labor in so far shall be fortunate enough to meet 
with the approval of | the learned, it umm be but an inconsidewsble 
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