330 Researches on Solar Physics. 
increment of heat will cause a considerable mass of liquid to 
assume the gaseous form, and vice versd. e may thus ver 
well suppose that an extremely small withdrawal of heat from 
the sun might cause a copious condensation; and this change of 
molecular state would, of course, by means of altered reflection, 
&c., alter to a considerable extent the distribution over the va- 
rious particles of the sun’s surface of an enormous quantity of 
heat, and great mechanical changes might very easily result. 
Again, although we cannot suppose our earth to be nearly so 
sensitive as the sun, yet the question may be entertained, Does 
e moon exert an influence of this kind upon the eart 
52. Our readers will, we think, agree with us in dividing the 
results of this paper into three classes. 
We have, in the first place, the pure results of observation. 
In the second place, we have put forth as an immediate deduc- 
tion from these observational results a connection between sun- 
spots and planets. The evidence in favor of this deduction ap- 
tory of this question. Professor Wolf has, it is well known, 
