 | Thomas Thomson - 1817 - Страниц: 514
...lens with the tips of her fingers ; she reads much easier through the lens than without it ; she says the letters appear larger, and as if they were printed on the glass. A penknife was laid on the line which she was reading, and she immediately perceived and named it.... | |
 | Thomas Thomson - 1817 - Страниц: 516
...with the tips of her fingers ; she reads much easier through the lens than without it ; she says die letters appear larger, and as if they were printed on the glass. A penknife was laid on the line which she was reading, and she immediately perceived and named it.... | |
 | 1817 - Страниц: 556
...lens with the tips of her fingers ; she reads much easier through the lens than without it; she says the letters appear larger, and as if they were printed on the glass. A pen-knife was laid on the line which she was reading, and she immediately perceived and named it.... | |
 | Kirby's wonderful and eccentric museum - 1820 - Страниц: 536
...always failed ; every thing appeared black. On one occasion she said a green card was yellow. 8th. — She read a line or two in small print by feeling the...letters appear larger, and as if they were printed on glass. When a hand was interposed between the lens and the book, she immediately perceived it. A penknife... | |
 | John Ware - 1818 - Страниц: 448
...lens with the tips of her fingers ; she reads much easier through the lens than without it ; she says the letters appear larger, and as if they were printed on the glass. A penknife was laid on the line which she was reading, and she immediately perceived and named it.... | |
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... letters. She next read through a convex lens at the distance of nine inches from the book. The principal focal length of the lens is 14 inches. While reading, she gently rubs the upper surface of the lens with the tips of her fingers ; she reads much... 