1872.] 527 [Chase 
oscillations from lunar influence are most antagonistic to solar action ; 
the principal minimum, near the time of new moon, when the oscillations 
tend most strongly to reinforce solar action. These laws have such gen- 
erality, that, at every station which I have hitherto examined, their influ- 
ence is distinctly traceable. 
Next in importance to the moon’s modification of solar meteorologie 
influence, appears to be its modification of atmospheric pressure. I first 
called attention to the importance of this perturbation, in the third and 
seventh inferences of my paper on the ‘tidal rainfall of Philadelphia’’ 
(ante vol. x. p. 581), and showed that at Philadelphia it was more im- 
portant than the direct and simple tidal energy. This modification, like 
the foregoing, is also traceable in all my previous lunar tables, and its 
prominence in the San Francisco curves (on lines 1 and 5, 3 and 7, in diagram 
y, and on lines 5, 3 and 7, in a, (7) is specially noticeable. 
The second inference in the paper above quoted, that the tidal rain- 
fall is, ‘‘like the ocean tides, more marked in low, than in high lati- 
tudes,’’ is illustrated by diagrams 7 and 9, If further confirmation is 
desired, it may be found in the tables accompanying my previous dis- 
cussions of different European, Asiatic and American observations. 
My first prediction, that ‘‘the tidal rainfall will generally be found 
more strongly marked on the western shores of the several continents, 
than in the same latitudes on the eastern shores,’’ is confirmed by the 
similarity in the amounts of average monthly fluctuation at San Fran- 
cisco and Lisbon, and the smaller fluctuation at Philadelphia (f, 0). 
This difference should of course be greatly modified in the regions of the 
monsoons, and reversed in the trade-wind regions. 
My third prediction, that ‘‘a certain degree of apparent opposition 
will be found to exist between the lunar influence upon the upper and 
lower cloud strata, dependent upon the normal difference of position in 
the tidal crests of deep and shallow fluid envelopes,’’ is partially verified 
by the tendency to maxima at quadrature as well as at syzygy (2 and 6, 
Oand 4, a, f, 7). The syzygy influence before new moon is manifested 
by the maximum after high barometer (7), but it is interrupted by the 
lunar intensification of solar action at new moon. If I succeed in obtain- 
ing such a record of the San Francisco winds as is necessary for the com- 
plete substantiation of the second, third and fourth predictions, I shall 
expect to find that the maxima at 2 and 6 are dependent upon the 
surface winds; those near 0 and 4 upon the upper atmospheric currents. 
I still feel some doubt with regard to the certainty and character of 
Jupiter’s influence upon the weather, but the amount of agreement be- 
tween the curves for three independent periods of eight, seven and eight 
years (£), the resemblance between the curves at Lisbon and at San Fran- 
cisco (7), when the origin of the ordinates is taken at opposition in one 
case and at conjunction in the other, and the character of the contrast 
between the lunar and Jovian curves at Lisbon (ante, p. 181), all tend to 
impress me with the belief, that at least one of the primary planets is 
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seer: 
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