the Nature of the Sun. 
*97 
Indentations are planetary Clouds , reflecting Light through the 
open Parts of the Corrugations. 
Jan. 15, 1801. The corrugations do not contain pores, but 
irregularly shaped depressed places, of a darker or rather less 
luminous matter than the borders of the corrugations ; probably 
owing to the same cause that makes the shallows appear less 
bright than the general surface. 
Feb. 7, 1801. The corrugations go up to the borders of the 
shallow of an opening observed since Feb. 4. Indeed the high 
parts of the corrugations themselves consist of the upper self- 
luminous clouds ; while their indentations are the reflection of 
light from the lower regions of the opaque ones. 
The opaque inferior Clouds probably suffer but little of the Light 
of the self-luminous superior Clouds to come to the Body of the 
Sun. 
Feb . 5, 1801. The shallow of a large opening, though already 
contracted, is still sufficiently broad not to permit a single direct 
ray of the superior self-luminous clouds to enter this opening ; 
and the blackness of the opening shews, that but little light can 
penetrate through the inferior region of planetary clouds of 
which the shallow consists. 
Motion of the inferior Clouds. 
Feb. 6,1801. The great opening of Feb. 4, is much dimi- 
nished : it is now divided by a branch of the inferior clouds of 
the shallow, with a few superior ones upon the following half 
of the division or bridge. The shallow on the other side of the 
bridge is plainly still free from: self-luminous clouds. 
Qq 
MDCCCI. 
