Free and Discounted Ebooks
Join 130,000 readers! Get our ebook deals straight to your inbox.

An Essay Towards a New Theory of Vision

Cover image for


Author: George Berkeley
Published: 1709
Language: English
Wordcount: 28,311 / 86 pg
Flesch-Kincaid Reading Ease: 53.1
LoC Categories: BF, QM
Downloads: 7,209 1039
Genres: Psychology, Science

g any other IDEA. If I do not perceive the redness or paleness of a man's face themselves, it is impossible I should perceive by them the passions which are in his mind.

11. Now from sect. 2 it is plain that distance is in its own nature imperceptible, and yet it is perceived by sight. It remains, therefore, that it be brought into view by means of some other IDEA that is itself immediately perceived in the act of VISION.

12. But those LINES and ANGLES, by means whereof some MATHEMATICIANS pretend to explain the perception of distance, are themselves not at all perceived, nor are they in truth ever thought of by those unskilful in optics. I appeal to anyone's experience whether upon sight of an OBJECT he computes its distance by the bigness of the ANGLE made by the meeting of the two OPTIC AXES? Or whether he ever thinks of the greater or lesser divergency of the rays, which arrive from any point to his PUPIL? Everyone is himself the best judge of what he perceives, and what not. in vain shall all the M



Join 120,000+ fellow readers! Get Free eBooks and book bargains from ManyBooks in your inbox. 

We respect your email privacy

login | register

User ID


reset password

Author of the Day

Elin Barnes
Elin Barnes has done many different things in her life, like being a flight instructor, working for a criminal appeals lawyer and working for many big name technology companies in Silicon Valley (Microsoft, Google etc.). But the one thing that she never thought would actually happen is to write (and finish) a book. Her debut novel, Justification for Murder, has, in the meantime, earned rave reviews and grown into a series. As our author of the day, Barnes reveals why she picked Silicon Valley as the backdrop, her inspiration behind writing a biomedical thriller and how she went for ride-alongs with the San Jose Police Department.
Read full interview...