Color-blindness : its dangers and its detection / by B. Joy Jeffries.

  • Jeffries, B. Joy (Benjamin Joy), 1833-1915.
Date:
1879
Catalogue details

Licence: Public Domain Mark

Credit: Color-blindness : its dangers and its detection / by B. Joy Jeffries. Source: Wellcome Collection.

    240/346 (page 212)
    Koman numerals; the second are vertical, under the >^ construed -^^-^n t^S^^^^ bt-il aconlSr^rth; brilUant colors t^^^^^^ Le. The tes^colors, with the J-^'iS ^ll^t Cn^r ot.~ra.r?l'SSnddo not choose '^VZ ctorfd-t^e iS Ltnded to he directly used . test litlW it -J--^hSToS Ll^nerSMeirM^ '^a^^^^^^^^^ the special ■ '^^ISlt'ronCit/hetween the worsteds^e colo. blind tatefromtheheapandthecontusron-cotoo^^^^^^ rather than the absolute sataratron The^^^^^^^^^ of our table are only to '>i'^'''^'^J^'f°]^^,\,^ie this and this purpose »7».Swt'the ti^it^e^^ The r.StiXt°rsample is presented. This sanrple shon^ireLpalest''shade(thelightes^)^o^^^^^ '^r:;yrb:^»^^^^^^^^^ examined P'-f,-^,tthr s P ^tTly, one or sev- the same shade, or else, with t^iese o ^ j eral skeins of the cl-s correspondx^^^^ to the col ^^^^^ fusion' (1-5), until he ^^^'^^^^^^^^L distinguish the difficulty in accomplisMng thi^^^^^^^^^^^ ^ „f ,h;Srf — ■ that is to say, finds that .