I 783 ] 
Other fide high the Jxis^ is here again KM. To conchide* 
thofe which are here the (hortell threds^ are on the other 
fide the longeft ; and thelongeft on the other fide, are 
here the fliorteft. To prefent this yet clearer to view, I 
have drawn with lines, the threds compofing one of the 
fcales of the CriJMlin body, feen on one fide^ as 77^. 
R T P S W Q, and notwithftanding it is a fiattijh round, 
I have here made it Globular^ with confideration, that in 
this Reprefentation, the threds conftituting each/r«/<?, 
may be the better difcerned. P and Q^are the middle 
points or Jxes^ of which P in the foregoing Fig, 2. is de«« 
noted by L, the threds iffuing out of the point P, in the 
foregoing Figure 2. L extend to V, where they are the 
fliorteft ^Ar^^j-, from whence they again extend back to P, 
where again they are the longeft, and from P they again 
€xtend to W", where they are again the fliorteft ; and 
thus alfo are extended the threds from T to Q^and from 
thence again to Xjc^od from X to Q^and thus half the 
courfe of every one^of the threds (fince we mull fuppoie 
this for an half round) is demonftrated. In fliort the 
threds LI, in the foregoing F^^. 2. are here PS s and the 
threds between LandMin the foregoing figure 2. are 
here the threds between P and X ; and the threds between 
L and O in the foregoing Fig. 2. are here, the threds be- 
tween P and T. So that the threds in the foregoing Fig. 
2. between FO LIKE, are here in Fig, 3- the fame 
wirhRTPS. Here is further to be obferved, that the 
^^r^^j- conftituting the Crifiallin Body, are thickeft about 
R and S, and the nearer they approach to P or they 
are the thinner. To conclude, when we view the (orQ* 
isiid Crzjlallin body with attention, as it cometh frefli out 
Glafs, notwithftanding it is compofed of fo many thou- 
fand threds, and that they lye very cloie compad: toge- 
ther, fo that one might juftly wonder, how the light can 
pafs through them in right lines, which isabfolutely ne- 
of the Eye, we find it to excel i 
the pureft 
B 
ceflary j 
