 | Endless amusement - 1825 - عدد الصفحات: 226
...concealed by it from either of your eyes, will nevertheless disappear. Another singular Experiment. Fix, at the •height of the eye, on a dark ground,...your eye still fixed on the first object ; when you are at the distance of nine or ten feet, the second will entirely disappear from your sight. Solar... | |
 | Thomas Curtis - 1829 - عدد الصفحات: 824
...as long when seen from E as from Ü, and but a third part so long -when seen from F as from D. 512. Fix, at the height of the eye, on a dark ground, a...a little lower, at the distance of two feet to the rieht, fix up another, of about three inches in diameter; then place yourself opposite to the first... | |
 | William Clarke - 1829 - عدد الصفحات: 476
...paper, which is not at all concealed by it from either of your eyes, will, nevertheless, disappear. Fix, at the height of the eye, on a dark ground, a small round piece ot white paper, and a little lower, at the distance of two feet to the right, fix up another, of about... | |
 | Jacques Ozanam - 1840 - عدد الصفحات: 850
...not been adopted, it is no less singular, and seems to prove a particular fact in the animal economy. Fix, at the height of the eye, on a dark ground, a...distance of two feet to the right, fix up another of ahout three inches in diameter ; then place yourself opposite to the first piece of paper, and having... | |
 | 1837 - عدد الصفحات: 800
...plaster, or moistened chalk, and when dry, painted or overlaid. WM B— m. Remarkable Illusion. — Fix, at the height of the eye, on a dark ground, a...piece of paper, and having shut the left eye, retire a few paces, keeping your eye still fixed on the first object ; when you are at the distance of nine... | |
 | William Clarke - 1849 - عدد الصفحات: 646
...which is not at all coneealed by it from either of your eyes, will, nevertheless, disappear. ANOTHEE Fix, at the height of the eye, on a dark ground, a...round piece of white paper, and a little lower, at the distauce of two fcet to the right, fix up another, of about thrce inehes in diameter ; then place yourself... | |
 | William Clarke - 1855 - عدد الصفحات: 722
...which is not at* all concealed by it from either of your eyee, will, ncvertitelesB, dUap|>ear. ANOTHER. Fix, at the height of the eye, on a dark ground, a small round piece of white pnper, and a little lower, at die distance of two feet to Uie right, fix up another, of about three... | |
 | 1875 - عدد الصفحات: 708
...is not at all concealed bv it tVojn either of your even, will, neverll teles*, disap|>ear. ANOTHER. Fix, at the height of the eye, on a dark ground, a • nr.ll round piece of white paper, and a little lower, at tlie distance of two feel to tlie right,... | |
 | William Clarke - 1880 - عدد الصفحات: 770
...finger, the paper, which is not at all concealed by it from either of your eyes, Trill disappear. 2. Fix, at the height of the eye, on a dark ground, a small round piece of whits paper, and a little lower, at the distance of two feet to the right, fix another piece, three... | |
 | 1842 - عدد الصفحات: 446
...the paper, which is not at all concealed by it from either of your eyes, will nevertheless disappear. Fix, at the height of the eye, on a dark ground, a...another, of about three inches in diameter ; then place yonrself opposite to the first piece of paper, and, having shut the left eye, retire backwards, keeping... | |
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Fix, at the •height of the eye, on a dark ground, a small round piece of white paper, and a little lower, at the distance of two feet to the right, fix up another, of about three inches in diameter; then place yourself opposite to the first piece of... 