The Principles of Psychology
The Principles of Psychology
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In our eReader you can find the full English version of the book. Read The Principles of Psychology 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 The Principles of Psychology
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We judge of distance by at least three separate indica- tions. When the observed object is known to us, the angle it subtends, or, rather, the space which its image covers on the retina, aids in the estimate. The particular focal adjust- ments which the eyes undergo to obtain distinct vision, and which are accompanied by certain muscular sensations, assist.
And the muscular sensations accompanying due convergence of the visual axes, supply a third evidence. In ordioary vision these indications ...agree. But by that ingenious in- strument of Professor Wheatstone's invention — ^the Pseudo- scope — the last two are made to contradict each other.
The muscular actions by which the visual axes are adjusted being the more marked, and accompanied by the stronger sensations, give the preponderating evidence ; and the result is that when looked at through the Pseudoscope, convex objects seem concave and concave objects seem convex. By particular management, however — ^that is, by adding to the evidence from focal adjustment some further evidence — ^the verdict of consciousness may be suddenly reversed.
What to read after The Principles of Psychology?
You can find similar books in the "Read Also" column, or choose other free books by Herbert Spencer to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
We judge of distance by at least three separate indica- tions. When the observed object is known to us, the angle it subtends, or, rather, the space which its image covers on the retina, aids in the estimate. The particular focal adjust- ments which the eyes undergo to obtain distinct vision, and which are accompanied by certain muscular sensations, assist.
And the muscular sensations accompanying due convergence of the visual axes, supply a third evidence. In ordioary vision these indications ...agree. But by that ingenious in- strument of Professor Wheatstone's invention — ^the Pseudo- scope — the last two are made to contradict each other.
The muscular actions by which the visual axes are adjusted being the more marked, and accompanied by the stronger sensations, give the preponderating evidence ; and the result is that when looked at through the Pseudoscope, convex objects seem concave and concave objects seem convex. By particular management, however — ^that is, by adding to the evidence from focal adjustment some further evidence — ^the verdict of consciousness may be suddenly reversed.
What to read after The Principles of Psychology?
You can find similar books in the "Read Also" column, or choose other free books by Herbert Spencer to read onlineMoreLess
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