5 6 Dr. Herschel on ihe Nature and Construction 
sun, are much gone out of the disc, and those in the following 
are come on. A dark spot also is come on with them. 
Sept. 13, 1732. There are a great number of faculae on the 
equatorial part of the sun, towards the preceding and follow- 
ing parts. I cannot see any towards the poles ; but a rough- 
ness is visible every where. 
Sept. 16, 1792. The sun contains many large faculae, on the 
following side of its equator, and also several on the preceding 
side. I perceive nolle about the poles. They seem generally to 
accompany the spots, and probably, as the faculae certainly are 
elevations, a great number of them may occasion neighbouring 
depressions : that is to say, dark spots. 
The faculae being elevations, very satisfactorily explains the 
reason why they disappear towards the middle of the sun, and 
re-appear on the other margin ; for, about the place where we 
lose them, they begin to be edge- ways to our view ; and if 
between the faculae should lie dark spots, they will most fre- 
quently break out in the middle of the sun, because they are 
no longer covered by the side views of these faculae. 
JSept. 22, 1792. There are not many faculae in the sun, and 
but few spots ; the whole disc, however, is very much marked 
with roughness, like an orange. Some of the lowest parts of 
the inequalities are blackish. 
Sept. 23, 1792. The following side of the sun contains many 
faculae, near the limb. They take up an arch of about 50 de- 
grees. There are, likewise, some on the preceding side. The 
north and south is rough as usual ; but differently disposed. 
The faculae are ridges of elevations above the rough surface. 
Feb. 23, 1794. By an experiment I have just now tried, I 
find it confirmed that the sun cannot be so distinctly viewed 
