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" ... coloured image of the sun first to descend, and then to ascend. Between the descent and ascent when the image seemed stationary, I stopped the prism, and fixed it in that posture, that it should be moved no more. For in that posture the refractions... "
Spectrum Analysis: Six Lectures, Delivered in 1868, Before the Society of ... - Page 27
by Henry Enfield Roscoe - 1870 - 404 pages
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Opticks:: Or, A Treatise of the Reflections, Refractions, Inflections and ...

Isaac Newton - 1730 - 432 pages
...Light at the two Sides of the refracting Angle, that is, at the Entrance of the Rays into the Prifm, and at their going out of it, were equal to one another*. So alfo in other Experiments, as often as I would have the Refractions on both fides the Prifm to be equal...
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Opticks: Or, A Treatise of the Reflections, Refractions, Inflections and ...

Isaac Newton - 1730 - 382 pages
...another*. So alfo in other Experiments, as often as I would have the Re^ fractions on both fides the Prifm to be equal to one another, I noted the Place where...the Image of the Sun formed by the refracted Light flood ftill between its two contrary Motions, in the common Period of its Progrefs and Regrefs ; and...
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The Elements of Optics: Designed for the Use of Students in the University

James Wood - 1801 - 251 pages
...light at the two fides of the refracting angle, that is, at the entrance of the rays into the prifm, and at their going out of it, were equal to one another *. The prifm therefore being placed in this pofture, I let the refracted light fall perpendicularly...
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The Penny Mechanic and Chemist: A Magazine of the Arts and Sciences, Volume 6

1841 - 488 pages
...that posture. For in that position, the refractions of the light at Ihe two sides of the refracting angle — that is, at the entrance of the rays into...their going out of it — were equal to one another. The prism, therefore, being placed in this posture, he let the refracted light fall perpendicularly...
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Spectrum Analysis -- Six Lectures

Henry E. Roscoe - 1869 - 372 pages
...light at the two sides of the refracting angle, that is at the entrance of the rays into the prigm, and at their going out of it, were equal to one another....refracted light stood still between its two contrary motions, in the common period of its progress and regress ; and when the image fell upon that place,...
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Spectrum analysis, 6 lects

sir Henry Enfield Roscoe - 1869 - 392 pages
...moved no more. For in that posture the refractions of the light at the two sides of the refracting angle, that is at the entrance of the rays into the...equal to one another, I noted the place where the imago of the sun formed by the refracted light stood still between its two contrary motions, in. the...
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Spectrum analysis, 6 lects

sir Henry Enfield Roscoe - 1870 - 450 pages
...moved no more. For in that posture the refractions of the light at the two sides of the refracting angle, that is at the entrance of the rays into the...refracted light stood still between its two contrary motions, in the common period of its progress and regress ; and when the image fell upon that place,...
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Spectrum Analysis: Six Lectures, Delivered in 1868, Before the Society of ...

Henry Enfield Roscoe - 1873 - 542 pages
...moved no more. For in that posture the refractions of the light at the two sides of the refracting angle, that is at the entrance of the rays into the...refracted light stood still between its two contrary motions, in the common period of its progress and regress; and when the image fell upon that place,...
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Spectrum analysis, 6 lects

sir Henry Enfield Roscoe - 1873 - 548 pages
...moved no more. For in that posture the refractions of the light at the two sides of the refracting angle, that is at the entrance of the rays into the...experiments, as often as I would have the refractions ou both sides the prism to be equal to one another, I noted the place where the image of the sun formed...
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The Theory of Light

Thomas Preston - 1890 - 465 pages
...moved no more. For in that posture the refractions of the light at the two sides of the refracting angle — that is, at the entrance of the rays into...their going out of it — were equal to one another. . . . The prism therefore being placed in this posture, I let the refracted light fall perpendicularly...
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