Fw: CVNet - Helmholtz on illusions

[Ron Blue]

----- Original Message ----- From: Bill Prinzmetal To: [EMAIL PROTECTED] Sent: Friday, October 20, 2000 8:01 PM Subject: CVNet - Helmholtz on illusions I am trying to track down the exact reference for the following quotation from Helmholtz: "The study of what are called illusions of the senses is a very prominent part of the senses; for just those cases which are not in accordance with reality are particularly instructive for the discovering the laws of those means and processes by which normal perception originates" I have found two different citations for this quote: Physiological Optics (1925 translation) and Popular Lectures on scientific subjects (1881 translation). But I can not find the quote in either place. (I can not claim to have read all of Physiological Optics!). If any one knows the exact reference, including the page, please let me know. Bill Prinzmetal [EMAIL PROTECTED]