on the Nature of the Sun. 361 
the sun look of a deep red colour ; and, by dilution, the red will 
be paler. This composition is not so distinct as the former. 
May 2. 5 h 20'. There are 36 openings, contained in six sets. 
As I have remarked, March 19th, April 4th, and April 19th, 
that ridges are generally placed in equatorial zones, so I now 
may add, that the different sets of openings have also been 
generally arranged in the same directions. 
May 3. n h 56 y . Ink mixture. There are 37 openings, ar« 
ranged in two zones. Four sets in the southern zone contain 
27, and three sets in the northern have 10 openings. Through 
this mixture, I can observe the sun in the meridian, for any 
length of time, without danger to the eye or to the glasses, with 
a mirror of nine inches in diameter, and with the eye-pieces 
open, as they are used for night observations. 
Slough, May 4, 1801. 
3 a 
MDCCCL 
