Edgefield advertiser. [volume] (Edgefield, S.C.) 1836-current, 1838-11-22
Proceedin g3ofh the british .4xsoc.c,joo G,,
tie lftcnacsmcaf Of Sc;rncc.
THE EVE
'.On some PRESENTATIONS or,hc Exc .l,,

Iif, j.. J r.,
:, pn some Preparations Of the Eve."hv
"r, 'inv wallace of Now York.
Or: D"Yts brewster laid before the AS
N'''"''h' asserIcs of h"nuriru' nrr3aratinns
=, ,"' eye. nadc hy Nr. clav Wallace. an
"''' ocuHsI IN New N",k. r:lrnla,cd To
'S''n'." sou'e important n,;n.s IN tho ,lcn.
VI ''S'"'h As II" nan"r ncrnn,nanicd
,u"Nr ProparalIons, w'irh had reached
"''h NJ New Castle. Sir David brewster
rNP'''"ra 70 the meeting 'hrir .cnaral nn
''''' "i,'' iHirnrtan e. Nr. Clay Wallace.
nr stated, cohsidrrs that I,, has discovered
III" nnpar"tps by which Tho cvcis adjusted
'" ,ii'ercntsdis'nnc">. This a,l;..slmcnt
Vs. he rnhce,v"s, effected in two ways-in
eyes ",'sIrhhvr ephrrir0f lcnses /, is pro
""c"" ny 3 M'"t'orm ar hook -s',nncd
'''.'Sc'e httachcd only 20 omr side the lens
"u''" NV ~ cons:ri,r'ion. brings ,br ,hrv.
.'!'''" 'cns bearer TIE r"iirn. In this raSr.
u Is ""''nis thai the lrnS will l,nvc :, Sliuht
moron "f ptaIi"n aih thar The hir,ro.cr
""'rh "hsss,n tho nvis Of vision rr"v,u,s
'" '"e contraction Of tho musr'c. will I've
mower ""fnt thar axis aftcr the n,li:,S,r,cut
:" INA! atsailieren' distances of the Ions.
rom 'ie rctina. different diame,crs nr i,
VIII he plaeed in the axis of v;s,r 4,
,'""iesS{s n' II srh"r" nr" All count ar,;
e'",'' IT, L'hy Wallace considered thai
.s.'' ;! :. w"ssa' ne equally perfect along the
"'icrent 4s9metcrs Of tho lens. hrouul,r nv
'o'",."h 'Is0ihc axis of vision sir Ha-
'n hrc"ster, however. remarked thar hc
""'. "e"ers5otihh among his numcrols cx-
tho lenses Of fishes any or
w''cn are;Eer'ertiv spherical. rs they were
" on '''ncr ssssV!He or proiG!r snh. rni,ls, 90
thit hiong.the different diamr,crs of tho
SOFA iehs1ne visicn would not hr similarly
Per'"rniettae But. independent of thi: cir
{ cc"'is.ahcfshe stated that in every solid
lens thersSsiSas only one line or axis in
VIZ Mssete g ses.d.'o ncr',c'lv disrnct,
soctorss hash-are seen nv The ANALYSIS Of
po!arizrd light. Along every other diam
cter the optical acrou Of The lens is not
symmetrical. When The lens is not n
sphere. but tenti:Ulnr. rs in the human eve
ar IN tho eyes Of most qnadrupr,ls. MIR.
{ Wallace considers that'hc apparatus inr
adjustment Is the same Oh scientific grounds
as those discovered hy Mr. Wallace. One
of tn" '::nst important results or Mr. Wat.
laceS disscci!on- is the discovery Of fI-cs
in tic rctinG. These fhrcs may he rem
d"rod distinctly visible. They divrrgc
from The base of,he optic nerve. ana; sur
round The .foramen or0Ir Of Sorm.nrrinr Al
the extremity cf the eye. Sir John Her
-ciic! had supposed >,:ch ii!,rcS ,o hn rct;ui
site III the explanation OF the theory of
vision. nMI 1t Is therefore '!ouh, interest
inG Io find that they have been artuallv
discovered. Sir David Brewster cnnclu
':"'' his observations by expressing hop"
hat nnatnmlStS in this country wouId turu
their attention t" he subject: and tha, with
tins view he would place The preparations
"i MIR. Clay Wallace in tn" Exl,;b,io,,
Room Al New I;s!le during the week.