Seeing And Thinking
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In our eReader you can find the full English version of the book. Read Seeing And Thinking Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Seeing And Thinking
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If the lens were a perfect thing, it ought to operate upon all the colours alike, and to send an image of a red point to the retina with exactly the same accuracy as it sends the image of a blue point, and to send those images to the same place. A perfect instrument, or an instrument made by Mr. Browning, say as well as he could make it, would do those things very nearly indeed. There are several other points of perfection THE EYE AND SEEING. 51 which would be absolutely required in a good in- ...strument made by an optician ; but these points are all of them very ill represented in the eye.
Regarded as an optical instrument, the eye is a practical success so far as it is wanted, but certainly not beyond that. I will read you what Helmholtz says : ' Now, it is not too much to say that if an optician wanted to sell me an instrument which had all these defects, I should decline to take it off his hands on purely optical grounds.' You see it is very fortunate for us that for ordinary purposes these defects count for nothing.
What to read after Seeing And Thinking?
You can find similar books in the "Read Also" column, or choose other free books by Clifford, William Kingdon, 1845-1879 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
If the lens were a perfect thing, it ought to operate upon all the colours alike, and to send an image of a red point to the retina with exactly the same accuracy as it sends the image of a blue point, and to send those images to the same place. A perfect instrument, or an instrument made by Mr. Browning, say as well as he could make it, would do those things very nearly indeed. There are several other points of perfection THE EYE AND SEEING. 51 which would be absolutely required in a good in- ...strument made by an optician ; but these points are all of them very ill represented in the eye.
Regarded as an optical instrument, the eye is a practical success so far as it is wanted, but certainly not beyond that. I will read you what Helmholtz says : ' Now, it is not too much to say that if an optician wanted to sell me an instrument which had all these defects, I should decline to take it off his hands on purely optical grounds.' You see it is very fortunate for us that for ordinary purposes these defects count for nothing.
What to read after Seeing And Thinking?
You can find similar books in the "Read Also" column, or choose other free books by Clifford, William Kingdon, 1845-1879 to read onlineMoreLess
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