s8 6 Dr. Herschel’s Observations to investigate 
openings lately broken out, and still breaking out among them. 
This leads us to suppose that some elastic gas, acting below the 
luminous clouds, lifts them up, or increases them ; and at last 
forces itself a passage through them, by throwing them aside. 
OF NODULES. 
Nodules are small , but highly elevated , luminous Places. 
Jan. 24, 1800. On the south, near the limb of the sun, is a 
nodule ; and on the south-following side is another, with two 
smaller ones near it. They are round, or roundish, bright eleva- 
tions, of the same nature as the ridges. 
Feb. 19, 1800. There are two small bright nodules, on the 
preceding limb of the sun. Why they should only be seen near 
the sun’s margin, can only be explained by admitting their 
elevation. 
Nodules may be Ridges foreshortened. 
Dec. 2 7, 1799. Mixed with many ridges, nearly parallel to the 
margin of the sun, are here and there small thicknesses or 
knotty places. I take them to be ridges in a more central 
direction, which gives them the shape of nodules. 
The most north of three nodules, in one of the ridges, seems 
to be highest in elevation. If it should last till to-morrow, it will 
then appear whether that nodule is really more elevated than 
the rest, or whether it is the foreshortening of a ridge extended 
in the direction of a radius. 
