^Btim (whilft ill Us duepofition or Expanfion in theEyeO 
and as the leaft breath of Wind moves the one:,fo the leaft ^ale 
of the Etherid or lucid matter ca ufes a vibration in the Gthcr, 
Further it was objeded , That it was hard to conceive 
how Co/oft a body as the thalamus Opticus (being only a pro- 
>tuberanCe of t\i^ Medullary part oi the Brain j could make 
fuch a difference in the Strefs or tenfion o( the fibres : But 
'tis apparent that upon drawing the Nerve from it^ forward 
(according as 'tis ftituated and runs toward the Eye) the Su^ 
perior fibres are more upon the vS^r^ than the te^m/, and 
:Nature in thefe cafes isfiner inheroperations fortofpeak 
more' properly the^r^^^ v^^jf/Z/o;^ of Nature is) then we are in 
our Conceptions of them. ^ It feems fo efpecially in the for- 
;mation of this Or^atiy where the Apparatus of its parts in or- 
der to vifion is fo curioufly contrive'd by the '^r^^^ Artiji 
and all is done as it were in fo fine Mzniature and with fo 
[oft Touches oihH inimirabie harvd.^ that^ k exeeeds as much 
i the other parts oi i^iQ humaiibody^^^''^^^^^ 
ntranfcend the remaining frame o^ the vifible' World. 
I 2. It has been objected by others. That if the Superior fi-^ ^ 
li'if^j- were more tenfe-then the inferior we ihould feebet- 
f*ier{byvTaies failing dn:-the top tha^n the brntm of -the Eye, 
/or fee an obj^d bectief ' ipkc'c-^ below Our ■^e fVh'en the 
• V^/W pafling in z. fir ai^t line iKo^ it muft> tiermfnalte in the 
^top fibres) then above it - 5 when vice verfa t\\ty muftter- 
< mrnate ^in the lomer fibres^ ; ^T:© this - 1 anfvver, 'that i^ d.oes 
::a(icordihgly;fall diat^fo>» ■ ^<fm)r^ pofitiV^^hd dt" 
.reft proof of mylOpinidn foi^-I appeail t(!)f ariy mia^i s^ej^S- 
'iVimQtm\^tihQrib^^ Si0O/^appta!r ^^Aot .^^etter^fo 
him , or he reads not better in it held about halt a yard-un- 
.:derhisEye thaaro mucfi abdVeit V Oi- whetliir-lle does not 
::mord readily diferd of fiiid OuG objeiSs b^n(^at* t/ha above " 
.:him with the (ajqie light rvand tkikmi<S)f\)t fuft&Pilluft^ltt- 
^ed by my '4: tfi^ '^uconit^:'4%^tn^^tx£-^^ ii^i<S^sj>p#a''piftg^fe^- . 
- ter on the ground to hinftih^t is pl^c'c oil a[ bigb^^eple then / 
X^) ^xpmm* 5r. Cent, 3. m uill. 3* 
