[ *7 ] 
We often find scheiner *and hevelius men- 
tioning many things concerning the fpots, which 
appeared to them very inexplicable, hevelius, 
when fpeaking of the vaft number of fpots which 
break out upon the fun, and of the prodigious fize 
of fome of them, admires how from his fingle 
body fo much matter, exhalations, &c. could be 
generated, as in any degree to be adequate to fo 
■many and fo vaft phasnomena. “ Nuclei autem, 
“ (fays he, Cometograph. p. 401) macularum 
« lcilicet partes denfiores, faepiusnnam partem cen- 
“ tefimam, imo quinquagefimam, de folari dia- 
« metro occupant ; fic, ut paucis dicam, im mania 
(i et admiranda funt corpora. Adhasc, intelledlum 
“ humannm fere fuperat, quomodo unquam, ex 
“ unico ifto corpore folis, tantum materia?, totque 
exhalationes vaporefque erumpere ac produci 
“ queant, quo talia vaftiffima phenomena procreari 
“ poffint.” Again, scheiner, when fpeaking of 
that property of the fpots, where a large nucleus 
is often divided into two or more nuclei, feems 
greatly puzzled to account for it. Sell. Rofa Ur- 
iina, p. 498, fays: “ Ex uno ftepe m-agno nucleo 
ci fiunt duo, tres, plurefve, non locali partium ip- 
M fius diftradtione, led intervallorum nefcio qua 
“ exinanitione. Manent enim illorum centra in- 
“ ter fe jequaliter diflita.” Many inftances of this 
fort could be brought ; and indeed, coriftdering the 
contrariety, betwixt any hypothefis they had formed, 
and what would now feem to be the real condition 
of the phaenomena, it is no wonder that fuch diffi- 
culties fliould occur. Every theory, how ingenious 
foever, which is founded upon a mifapprehenfion 
Vol. LXIV- D »■ of 
