Doubts concerning the inversion of objects on the retina / by Marmaduke Berdoe.

  • Marmaduke Berdoe
Date:
1772
Catalogue details

Licence: Public Domain Mark

Credit: Doubts concerning the inversion of objects on the retina / by Marmaduke Berdoe. Source: Wellcome Collection.

    39/98 (page 33)
    \ [33'] die mod conliderable, bat the mod ex- pofed to the impreffions of external obje61sp and its agent the pureft fubftance in nature., the rays of light. Is it not furprizing, that of all the fenfes, it is the only one whofe phenomena have remained a profound myftery ? For the other fenfes are known to be caufed by the impuife of different agents which affebl them, and our fenfations are deduced from their irnpreffion on the nerves of the human body. The adtual con¬ tact of objedls determines their qualities and form, when examined by the fenfes of feeling and tailing. The olfablory nerves are fti- mulated by certain particles floating in the air, the auditory by the vibrations of founds. The retina ffimulated by the rays of light which are refledled from th^ external furface of bodies, is fubjedled to the general caufe of impreffions with our other fenfes. Why then are we to fuppofe, that the paintings alone of objedls on the retina do caufe, or are effen- tial to the laws of via on ? Has any one feen E lids