COLOUR BLINDNESS DEFINED AND EXPLAINED.

Samoa Times and South Sea Gazette, Volume 2, Issue 86, 24 May 1879, Page 2

COLOUR BLINDNESS DEFINED AND EXPLAINED.

i.'.r W-lham'i lo wriiiig ii' Nature ' Sids -jr.pl*ira the true iirr.ka a:d nature ;f 0.-l'jur-l-liaidaess As !e'- rwji'i L--.v« a :.. ;>i. •;.:'-■?.- reilsj' s--sa-., I ::ius' .•ci !s»»» r.. -los':!'!.': » "of- ; >;. :mj briefly I •?--., i. tli-j Plaksiphistl for J uJ-i:- details and de-~.a-:H'.~:::k:. piiha' firs' p!-'.;» -•• win., *.d ;.■!• i. •.'.; 'Lr.iihte « .■--.-::.• d gr-jy (_/.-:."idti ':•■; .'ro-... tl.'oy .".L-jr •;':j™- s>"-fcfrely -a ctr.Sia • i: >i-.--..riiy, *, a-'i tf. c\ -.:.:, ;.r ■*erlv ?.• twllivi, tiauiuly, '•» j-.-j. :: ± »3 can ts ae "tii--.-d .". <h» r. vr.i-ia- sav'.i.&y-,/.-7. i.r? ;h-.- :aiy oc'.?uri v> ? wk'.'b.- yfs\LA'ti .jay :ias:--•'.ji; led L*noa -..0 i»3 -sa: i'.o &»u>.' 'f viaiot." Bu-. ■■'>■•• j:vi?.3 i,U-< di£put*y :. r,j* • uxtif iis'i;-. It n>if a*iu'-».ijr ce .».,it.:,: Do wi' :cSfrB.K cbji;j! .-.'jaber, iobu-a sac 1 : aa r-caea.' -jr«», sj f .Vjd i- ; ••ffii •-!•''• ieatjfcn. ->a'd. *i.iy 1"3^ ; Hi.*? Xh* answo--it that v.a (l. fee all aujh. thi-gs, bav tkit tLfif d: no 1 ; giv* ui the oolour 3-iißau:E:; owfefctly .el ct;"'Ck t them their colours ippoar fo ua varieties if the other colour e»r,sati:as w'd lb -vr& \ra ,ab!o to receive. TL".e •■■ ill b-) 'best « plained by exauiplai. A. aoliiftrt coat :r a stick of red aaaliag-«rax .cor.veya to me a very positive seuaatiw ef oolsur, by ?hi:h I am ptrfeotly abla to identi-y ia >■. graat -uE.bcr of bcdica ef thia hue If, th«K-aav - th* inTeatigatiea of my experience -ended hare, there w;uld to no resaan to coiaider me blind to red, eras haviag any mn defect in my vision regarding it But I examine more eloealy what I really do see, lam obliged to eomo to the conclusion that th* Mcaaiios IJ perceive is not en* that I oan identify '. dapsrately, bat is simply ?. modifiov ! ticn of on* of my otter sanseUons—aamely, yellow,! It is. in fact, a y*llot7 shaded with black ir gray—* a»rk*aed yellow, or irhatl may call y*ilow brown. I find that all to* most oox.-toa hues of rei Sflrrasp.-sd with this dascriptien, and n proportion a* they >u m.-re scarlet or more tending towards orange, :h*yalio w I aei is mars vivid. The explanation I suppose is that none of eueh reds ar* pare; they -<re :cmbisa tions of rod with yellow, so that I see th* yellow element of th« oooabiaatioc while the true rod sloma&t in invisible to me M • colour, a&d sots only ua darkening shade. » ii