154 P. E. Chase on Barometric Indications of a Resisting Aether. 
within the limits of probable error, lends strong confirmation to 
my original hypothesis, and seems to require a revision of the 
reasoning which has led to the prevalent belief that all the in- 
fluence of rotation must be constantly uniform, and therefore 
incapable of producing any tidal action. 
Perhaps the error of that reasoning, as applied to the earth, 
has arisen from considering the joint action of rotation and or- 
bital revolution, and making undue allowance for the mutual 
compensation of their mutual disturbances. That such compen- 
ion must be effected at every instant, I have no reason to 
doubt, but how is it modified by the stress of gravity and the 
stretch of molecular elasticity? That stress, at the surface of 
the earth, is nearly three hundred times as great as would be 
necessary to retain the particles in orbits at the same mean dis- 
tance from the earth’s centre; and since it probably follows a 
different law from the countervailing elasticity, it seems to me 
that each of the forces must be constantly accomplishing work. 
The value of this work must form an important element in 
calculations of the effects of the earth’s rotation, and, if it were 
properly ascertained, I have little doubt that it might be repre- 
sented by a formula analogous to the one which I have deduced 
from the relative motions of the air and the earth’s centre.’ 
I am inclined to believe, as I have intimated elsewhere, that 
a due consideration of these relative motions may help to ex- 
plain other compensations, such as the variations in temperature 
and the deposition of dew during the night, the fluctuations of 
magnetic force, &. I content myself, for the present, with @ 
simple statement of the belief, because its confirmation or ref 
tation will depend principally upon the results of the investiga 
tion that I am now inviting. ‘ 
The following table is constructed from data furnished by 
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the other columns require no explanation. 
oe . Tt willl be readily seen that the sun’s attraction js in the same direction as the os 
___earth’s, and opposed tv the molecular elasticity, at midnight; but at noon it sc# 
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