. ( m ) 
others lefs and thinner, and all encompafs’d with Ne- 
bnU : In viewing thefe, I fay, I obferv’d great alterati- 
ons at the very time I was looking on them. Some- 
times the Nuclei were very dark and black, fometimes lefs 
foj and the fame thing I obferved alfo in the NebuU 
encompaffing them.' One of the leffer Spots b. in Fig. j. 
which the Day before was fufficiently vifible and ftrong, 
was this Day, now thick and ftrong, and anon languid 
and lefs vifible. And from the two Spots a. and d . I could 
plainly fee a Smoak iftuing out to c. and f. fometimes . 
vifible for 5 or 6 Minutes, and then difappearing for a 
quarter of an Hour, or more, and then again fmoaking 
out, and again difappearing, as before. All which Par- 
ticulars, I faw over and over again repeated, for a good 
while together, till I was weary of the Observation. 
Thefe Spots l was hindered from viewing until Jug. 
5. following: And then I fotfnd the Spot b. quite extinfr, 
(as I expetted,) as alfo fome of the other Spots 5 toge- 
ther with the NebliU grown lefs. But the great Spot 
. a • continued dark and ftrong, only fometimes fainter, 
and then again ftronger $ and fometimes like a half, or 
horned Moon } fometimes roundifh, or rather of an Or 
val Figure ; of which latter Figure they commonly are, 
when they are near the Suns Limb, which this Spot was 
not far off at this time. 
Thefe particulars are Confirmations of what I faid. 
That the Solar-Spots are no other than a Smoak rifng out 
of the body of the Sun, Of which Opinion I have been 
alrnoft ever fince l firft obferv’d them, and find that I 
am not fingular in this Opinion, as I fhall {hew from a 
Letter (Vh ch with fome others is lately fallen into 
my Hands) from the admirable Mr. Crabirie to the no 
lefs admirable Mr. Gafcoigne , the Inventor of the Micro- 
meter^ which I prefume will hardly be ungrately to this 
moft illuftrlous Society. 
The 
T t 2 
