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.

    8/98 (page 4)
    the obje£ts as it were, and by that means render'd them vifible, Being reflefled Back again on the eye with a new modification, and by their union with the obje6f, the rays caufe an impreffion on the pupilla, and produce the fenfation of the objeft. This they attempted to prove by the following circumftances. By the natural luftre of the eye. They obferved alfo that we perceive a cloud or mill which is a great way from us, without diftinguifhing that which fur- rounds us. That we don't perceive an objedf which is on the pupilla. That the eyes are weakened by regarding an obje6f for a long time, which they fuppofed to be owing to the quantity of rays emanating from them. That fome animals have the property of feeing in the night. The Epicureans imagined that vifion con¬ fided in an emanation of corporeal atoms from the furfaces of bodies. They believed in a kind of atomical influx, which evapor¬ ated from the intimate parts of bodies, and