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" Glass-Globe filled with Water, and viewing it in such a posture that the rays which come from the Globe to the Eye may contain with the Sun's rays an angle of either 42 or 50 degrees. "
A Short System of Polite Learning: Being an Epitome of the Arts and Sciences ... - Page 33
by Daniel Jaudon - 1814 - 214 pages
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Opticks: Or, A Treatise of the Reflections, Refractions, Inflections and ...

Isaac Newton - Light - 1730 - 403 pages
...hanging up any where in the Sun-mine a Glafs Globe filled with Water, and viewing it in fuch apofture, that the Rays which come from the Globe to the Eye may contain with the Sun's Rays an Angle of either 42 or £Q Degrees, For if the Angle be about 42 or 43...
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A Compleat System of Opticks in Four Books, Viz. A Popular, a ..., Volume 1

Robert Smith - Electronic books - 1738 - 402 pages
...hanging up any where in the fun-mine a glafs-globe filled with water, and viewing it in fuch a pofture that the rays which come from the globe to the eye may contain with the fun's rays an angje of either 42 or 50 degrees. 506. It remains now to take notice...
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An Epitome of the Arts and Sciences: Being a Comprehensive System of the ...

William Duane - Education - 1811 - 378 pages
...rainbow ; providea transparent glass globe, and fill it with pure water, hang it in the sunshine and view it in such a position, as that the rays which come...eye, may, with the sun's rays, include an angle of about 42 degrees, the spectator will see a full red color in that side of the globe opposite to the...
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A Philosophical and Mathematical Dictionary: Containing an ..., Volume 2

Charles Hutton - Astronomy - 1815 - 686 pages
...Thus, by hanging up a glass globe, full of Water, in the sunshine, and viewing it in such a posture that the rays which come from the globe to the eye, may include an angle either of 42° or 50°,with the sun's rays ; for ex. if the angle be about 42°, the...
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