but of that diameter : And ^fe^.that the rays^ whofeerror 
is fo great,are but very few in eomparifoo to thofe^ which are 
refraiSed more Juftly 3 for, the rays which fall upon the mid- 
dle^partsof the Glafs, arerefra^^wh fufEcient exaaoefs, 
as alfo are thofe that fall near th^ perimeter and have a mea^ de- 
gree of Refrangibility ; So that there remain only the rays, 
which fall near the perimeter and are ^oji or leajl refrangible 
tocHuieaoy fenfibleconfufioninthePifture, And thefcare 
yet io much further weakened by the greater fpace, through 
which they are fcatter*d, that the Light which falls on the due 
point, isiofiniteJy more denfe than that which falls on any 
other point round about it. Which though it may feem a 
Paradox^ yet is certainly demonftrable. Yea, ahhough the 
Lighr, which paffcs through the middle parts of the Glafs, 
were wholly intercepted, yet would the remaining light con- 
vene iufinitely more denfe at the due points^than at other pla- 
ces. And by this exccfs of Denfity3the Light, which falls m 
or invifibly»e^r the juft point ^may J conceive, ftrike the fen- 
firium fo vigoroufly^that the imprefs of the weak light, which 
errs round about it;fhall,in comparifon, not be ftrong enough 
to be animadvertedjOr to caufe any more fenfible confufion io 
the PiiSure than is found by Experience. 
Tbisjl conccive5is enough to fhew^Why the Pidure appears 
fo diftinft^notwithftanding the Irregular refraction* But, if 
this fatisfie not^N. may try,if he plcafe^how diftin(3: the Pifture 
will appear, when all the Lens is covered excepting a little hole 
next its edge on one fide only : And^if in this cafe he pleafe to 
mcafure.tbe breadth of the colors thus made at tlK^edge of the 
Suns picture, he will perhaps find it to approach nearer to my 
proportion than he expeds« 
