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" By the assistance of such glasses, therefore, the rays from a distant object fall on the pupil as divergent as those from a less distant object ; and, with short-sighted people, they throw the image of a distant object back as far as the retina. "
Conversations on Natural Philosophy: In which the Elements of that Science ... - الصفحة 294
بواسطة Mrs. Marcet (Jane Haldimand) - 1821 - عدد الصفحات: 311
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Conversations on Natural Philosophy: In which the Elements of that Science ...

Mrs. Marcet (Jane Haldimand), Thomas P. Jones - 1826 - عدد الصفحات: 286
...which are already divergent, still more so. By the assistance of such glasses, therefore, the rays from a distant object, fall on the pupil, as divergent...devise for such persons as have a contrary defect m their sight; that is to say, who are long-sighted, in whom the crystalline humour, being too flat,...

Library of Useful Knowledge: Natural philosophy, المجلد 2

1832 - عدد الصفحات: 642
...lens being exactly the reverse of a convex one. By the assistance of such glasses, therefore, the rays from a distant object fall on the pupil as divergent...image of a distant object back as far as the retina. Those who suffer from the crystalline humour being too flat, apply an opposite remedy : that is to...

Natural Philosophy: With an Explanation of Scientific Terms, and ..., المجلد 2

1832 - عدد الصفحات: 640
...assistance of such glasses, therefore, the rays from a distant object fall on the pupil as divergent ав those from a less distant object ; and, with short-sighted...image of a distant object back as far as the retina. Those who suffer from the crystalline humour being too flat, apply an opposite remedy : that is to...

Book of lessons for the use of schools, كتاب 5

Ireland commissioners of nat. educ - 1835 - عدد الصفحات: 398
...lens being exactly the reverse of a convex one. By the assistance of such glasses, therefore, the rays from a distant object fall on the pupil as divergent...image of a distant object back as far as the retina. Those who suffer from the crystalline humour being too flat, apply an opposite remedy : that is to...

Fifth Book of Lessons for the Use of the Irish National Schools

1836 - عدد الصفحات: 424
...lens, being exactly the reverse of a convex one. By the assistance of such glasses, therefore, the rays from a distant object fall on the pupil as divergent...image of a distant object back as far as the retina. Those who suffer from the crystalline humour being too flat, apply an opposite remedy : that is to...

The Moral and Intellectual School Book: Containing Instructions for Reading ...

William Martin - 1838 - عدد الصفحات: 368
...lens being exactly the reverse of a convex one. By the assistance of such glasses, therefore, the rays from a distant object fall on the pupil as divergent...image of a distant object back as far as the retina. Those who suffer from the crystalline humour being too flat, apply an opposite remedy ; that is to...

Conversations on natural philosophy, by the author of Conversations on chemistry

Jane Marcet - 1839 - عدد الصفحات: 544
...which are already divergent, still more so. By the assistance of such glasses, therefore, the rays from a distant object fall on the pupil as divergent...contrary defect in their sight ; that is to say, in whom the crystalline humour, being too flat, does not refract the rays sufficiently, so that they reach...

The Panorama of Science: Or, a Guide to Knowledge

George Grant - 1849 - عدد الصفحات: 328
...lens being exactly the reverse of a convex one. By the assistance of such glasses, therefore, the rays from a distant object fall on the pupil as divergent...image of a distant object back as far as the retina. Those who suffer from the crystaline humour being too flat, apply an opposite remedy : that is to say,...

In Nature's Name: An Anthology of Women's Writing and Illustration, 1780-1930

Barbara T. Gates - 2002 - عدد الصفحات: 700
...which are already divergent, still more so. By the assistance of such glasses, therefore, the rays from a distant object fall on the pupil as divergent...contrary defect in their sight; that is to say, in whom the crystalline humour, being too flat, does not refract the rays sufficiently, so that they reach...
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