'[. 339 ;] 
better aftronomers, who have calculated their mo- 
tions. The circumftance of the faculce being fome- 
times converted into fpots, I think I may be fure of. 
That there is generally (perhaps always) a mottled 
appearance over the face of the fun, when carefully 
attended to, I think I may be as certain. It is moft 
vifible towards the limbs ; but I have undoubtedly 
Teen it in the centre : yet I do not recoiled to have 
obferved this appearance, or indeed any fpots, to- 
wards his poles. Once I faw, with a 12-inch .re- 
flector, a fpot burft to pieces while I was looking at 
it. I could not expeft fuch an event; and there- 
fore cannot be certain of the exaCt particulars : but 
the appearance, as it {truck me at the time, was 
like that of a piece of ice when dafhed on a frozen 
pond, which breaks to pieces and Aides on the 
lurface in various directions. I was then a very 
young aftronomer ; but think I may be fure of the 
fa ft. Perhaps I may be thought a young aftronomer 
fti!l, for throwing out thefe rough obfervations and 
crude thoughts : but whatever they be, if my errors 
fhall lead others into enquiries which may be pro- 
ductive of certainty, their end will be anfwered. 
Chillehurft, 
Jan. 5, 1774.. 
FRANCIS WOLLASTON. 
*' ' ’ ' ; ’ 1 . . ' T ■ i t • 
X x 2 XXXV. 'An 
