11597
deprehenduntur).
addo, confuſionis evitandæ causâ ſymbolum I
dehinc in his exemplis perpetuò majorem proportionis refractiones
dimetientis terminum denotare, quocunque de medio in quodcunque
peragatur refractio. porrò, medium primum infringens perpetuò
denſius intelligatur rariori circundatum. item, in figuris appoſitis
litera C denotat centrum anterioris circuli, K centrum poſterioris;
& B verticem anterioris, D verticem poſterioris; denuò deſignat Y
locum imaginis quæſitam.
dehinc in his exemplis perpetuò majorem proportionis refractiones
dimetientis terminum denotare, quocunque de medio in quodcunque
peragatur refractio. porrò, medium primum infringens perpetuò
denſius intelligatur rariori circundatum. item, in figuris appoſitis
litera C denotat centrum anterioris circuli, K centrum poſterioris;
& B verticem anterioris, D verticem poſterioris; denuò deſignat Y
locum imaginis quæſitam.
Hiſce præmonitis, primum de longinquo radiantium, ſeu paralle-
los ejicientium radios punctorum imagines, pro lentium varietate, ſic
determinantur.
los ejicientium radios punctorum imagines, pro lentium varietate, ſic
determinantur.
_I._
Ad lentem plano-convexam.
11Fig. 151.
_II._
Ad lentem plano-concavam.
Fiat I- R.
R :
: DK.
DY.
_In Vitro_ eſt DY = {3/2} KD.
_In Aqua_ eſt DY = 3 KD.
_III._
Ad lentem convexo-planam.
22Fig. 151, 152.
_IV._
Ad lentem concavo-planam.
Fiat {I - R.
I :
: BC.
BZ;
&
\\ I.
R :
: DZ.
DY.
_In Vitro_ DY = {3/2} BC - {3/5} BD.
_In Aqua_ DY = 3 BC - {3/4} BD.
_V._
Ad lentem convexo convexam.
33Fig. 152.
_VI._
Ad lentem concauo-concauam.
Fiat {I- R.
I :
: BC.
BZ;
&
\\ {I/R} KZ - DZ.
DZ :
: DK.
DY.
_Coroll._
Adintegram Spharam.
Fiat 2 I - 2 R.
I :
: CD.
CY.
_VII._
Adlentem conuexo-concauam.
44Fig. 152, 153.
_VIII._
Ad lentem concauo conuexam.
Fiat I - R.
I :
: BC.
BZ.
&
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