t m 3 
^id it before me, ^and thofe tfaat have mention d tfee fame ex- 
periment fince (w ithoutt'ikiflg notice hereof) have miftook 
my intent in it. For the putting the l^etina in water is not 
to wafl^ off the mucous Subjiance , which is its proper Sub;- 
fiance but Ws to expatui the Fibreshf the playing ic up and 
ctown in warm water ^and to magnifie thelmageoi ii by a double 
refraUion of the lucid raics » which pals throttghthat and 
the Gla(s that contains ir. 
That there is a XiixX^ vMte fiimy mafter comet oflf upoa 
wafting the J{ftma is true, and this ferves to fill up the ifiur. 
JUces of the Fibres and thicketi the Coat, wher<^by the Raies 
terminate the better>and pafs not thr^^ugh to the Choroeides» 
fwbich takes off in fomemeafure MonsK Mariotte's objecti- 
on of which more anonj and this may be part of the fuccuf 
Nutritmof theNervc> tho however the Coat may be as 
well hid ftflere [pedes (as they call it> or to terminate the 
Raies , as the Oitd Faper does the turning Images in the 
i^/^if^mnotwithftanding ic be in fome meafure diaphanous. 
Befides toward the bottom of the Eye the Fibres of this Coat 
ro;^f^rg^ very much or come clofer together, and *tis here 
chat is the moil lively reprefentation or exquifitejlfenfe of the 
objecft^for w<^^ reafon partly,asalfo partly from it's figure,! 
formerly took the liberty of calling it a Pi«^^//^ inverted. This 
lies in Men diametrically oppofice ^ to rhe PupiU^n the Optie 
Nerve is plac'd in the foremenrioned figure : but in Brutes 
more obliquely by reafon of the infertionof the Optii: Nerve 
- more toward the inner Canthus s fo thacfomeiimes(as we 
may fee in Horfes upon flmrting) they are forc't to turn their 
Eye accordingly^to diiiinguifti clearly objeds that furprizc 
them. 
7. But nextofalll wouldhave itobferv'd, that where- 
as I fay the intermediate Fibres gradually differ in ten/ion 
as they are nigher or further from the^o^ oftheThalamiop- 
tici y it may beeafily fuppos'd that they do it by fo M/. 
(e) UOpbth.p^ ^o, pubiilhed* A. V. 1676, 
(0 Fig. I. li^tboje Fh'UouCoUs^ms. 
