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.

    10/98 (page 6)
    [ 6 ] \ ' of Defcartes and Newton. For they* all three fuppofe a medium. The fun, fays Defcartes, preffes the fub- tile matter found thro the vail compafs of the world, whofe vibrations reflected from the furfaces of this matter, are communicated < < to the eye, and from thence to the fen- forium-commune. Newton fuppofes vihon to be owing chiefly to the vibrations of an exceeding thin medium, which by means of the rays of light are put in motion on the bottom of the eye. This impreffion communicating again by the filaments of the optic nerves, to the fenforium-com- mune, conftitutes the fight. The celebrated Kepler, in his ingenious purfuits on this fub- jecl, wrote his Paralipomena ad Vitellionem, and reduced the laws of vifion to thofe cer¬ tain and, as he thought, invariable rules, which form the prefent fyflems of the mo¬ derns. He probably was indebted to the hints given by John Baptifl Porta, for the difcovery : who firfl obferved the phaeno-