360 Dr. Herschei/s additional Observations 
as white as snow ; and I saw objects very distinctly, without 
darkening glasses. 
As one of the largest openings had a considerable shallow, I 
found, in viewing it through this mixture, that the difference 
between what I suppose to be the light reflected from opaque, 
and the direct light of empyreal clouds, is now more striking 
than I ever had observed it before. 
The ridges, through this composition, appear whiter than the 
rest of the sun. 
The tops of the corrugations are whiter than their indenta- 
tions, instead of approaching to a yellowish cast, as they do in 
my former way of seeing through green smoked glasses. 
The corrugations are very small and contracted to day. 
Suspecting that this new way of seeing might represent 
objects less than they appear, when I view them through an 
eye-piece that gives them in the manner I have been used 
to see them, I put on again the former composition ; but 
found the corrugations as small and close then as they appeared 
before. 
I count 3 6 openings. 
When the ink mixture is more diluted, the sun’s image will 
become tinged with purple. 
A solution of green vitriol, with a sufficient number of drops 
of the tincture of galls to stop as much light as is required, gives 
a dark blue colour to the sun ; and, by dilution with water, a 
light blue. It is considerably distinct. 
With this composition, the corrugations look whiter at the top 
than in their indentations. 
The tincture of galls, with as many drops of the solution of 
green vitriol as will turn it sufficiently black to stop light, makes 
