 When a Man in the dark presses either corner of his Eye with his Finger, and turns his Eye away from his Finger, he will see a Circle of Colours like those in the Feather of a Peacock's Tail.  Zoonomia - Page 442by Erasmus Darwin - 1818Full view - About this book
 | Isaac Newton - Light - 1730 - 403 pages
...not meet, if I am rightly inform'd. ^u. 1 6. When a Man in the dark prefies either corner of his Eye with his Finger, and turns his Eye away from his Finger, he will fee a Circle of Colours like thofe in the Feather of a Peacock's Tail. If the Eye and the Finger remain... | |
 | Regnault (Père, Noël) - Science - 1731 - 492 pages
...Dark, The * Mem. de 1'Acad. 1700. p. 289. f When a Man in the dark prefles either Corner of his Eye with his Finger, and turns his Eye away from his Finger, he will fee a Circle of Colours like thofe in the Feather of a Peacock's Tail. If the Eye and the Finger remain... | |
 | Early English newspapers - 1786 - 680 pages
...changing .. . long as " they exift. " 3. When any one in the dark ** preflei either corner of his eye with " his finger, and turns his eye away " from his finger, he will fee a circle of " colours like thole in a peacock's tail : " and a (udden fl.-.lh of light is excited.... | |
 | Erasmus Darwin - Evolution - 1801 - 602 pages
...perpetually changing as long as they exift. 3. When any one in the dark prefles either corner of his eye with his finger, and turns his eye away from his finger, he will fee a circle of colours like thofe in a peacock's tail : and a fudden flam of light is excited in the... | |
 | David Hartley - Apologetics - 1801 - 544 pages
...Sir Ifaac Newton, Opt. §>u. 16. viz. " When ." a man in the dark prefles either corner of his " eye with his finger, and turns his eye away from " his finger, he will fee a circle of colours like thofe " in the feather of a peacock's tail. And this " appearance continues... | |
 | Erasmus Darwin - Evolution - 1803 - 622 pages
...perpetually changing as long as they exift. 3. When any one in the dark prefles cither corner of his eye with his finger, and turns his eye away from his finger, he will fee. a circle of colours like thofe in a peacock's tail : and a fudden SEcT. XL. i.4- OCULAR SPECTRA.... | |
 | Henry Coddington - Geometrical optics - 1825 - 254 pages
...brain, cause the sense of seeing." And again, " When a man in the dark presses either corner of his eye with his finger, and turns his eye away from his finger,...circle of colours like those in a peacock's tail. Do not these colours arise from such motions excited in the bottom of the eye by the pressure of the... | |
 | James Cowles Prichard - Biology - 1829 - 268 pages
...oscillatory movements in the fibrils of nerves. " When a man in the dark presses either corner of his eye with his finger, and turns his eye away from his finger, he 'will see a circle of colours like those in the feathers of a peacock's tail. If the eye and the finger remain quiet, these colours vanish in a... | |
 | Thomas Curtis (of Grove house sch, Islington) - 792 pages
...wanton sailors with a feathered cloud. Prior. When a man in the dark presses either corner of his eye with his finger, and turns his eye away from his finger, he will see a circle of colors like those in the featheri of a peacock's tail. Newttm. A feathtrdrwer had the residue of his... | |
 | John Fearn - 1830 - 366 pages
...from this " principle that, when a man in the dark rubs the under part, " or either corner of the eye, with his finger, and turns his eye " away from his finger, he will see toward the opposite side of " the eye a circle of fiery colours, like those in the feather of a " peacock's... | |
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