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the Nature of the Sun. 
i2 h 30'. There were two pores north-preceding the same 
opening. When I returned to the telescope, in order to describe 
their situation exactly, they were vanished. 
OF THE REGIONS OF SOLAR CLOUDS. 
It must be sufficiently evident, from what we have shewn of 
the nature of openings, shallows, ridges, nodules, corrugations, 
indentations, and pores, that these phenomena could not appear, 
if the shining matter of the sun were a liquid ; since, by the laws 
of hydrostatics, the openings, shallows, indentations, and pores, 
would instantly be filled up ; nor could ridges andnodules preserve 
their elevation for a single moment. Whereas, many openings 
have been known to last for a whole revolution of the sun ; and 
extensive elevations have remained supported for several days. 
Much less can it be an elastic fluid of an atmospheric nature : 
this would be still more ready to fill up the low places, and to 
expand itself to a level at the top. It remains, therefore, only 
for us to admit this shining matter to exist in the manner of 
empyreal, luminous, or phosphoric clouds, residing in the higher 
regions of the solar atmosphere. The following observations, 
will explain and support this idea more at large. 
Changes in the Solar Clouds happen continually. 
Feb. 19, 1800. In order to find whether the solar clouds 
were subject to very quick changes, I fixed my attention on 
several places ; but, on looking off, even for a moment, the spots 
I had marked for the purpose could not be found again.* 
* See what has been said of the quick changes among the corrugations and inden- 
tations, under the former articles. 
