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" A rather singular method," say Messrs. Herschel and South, " of obtaining a view, and even a rough measure, of the angles of stars of the last degree of faintness, has often been resorted to, viz. to direct the eye to another part of the field. In this... "
Elements of physiology - Page 327
by Thomas Johnstone Aitkin - 1838 - 514 pages
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The Edinburgh Journal of Science, Volume 3

Science - 1825
...rough measure of the angle of position. They directed the eye to another part ofthejield. In this way, a faint star in the neighbourhood of a large one will...appearing and disappearing alternately, as often as we please. The small companion of 23 (h) Ursae Majoris, is a remarkable instance of this, and also...
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The Edinburgh Journal of Science, Volume 5

Science - 1826
...eye to another part of the field ; in this way, a faint star in the neighbourhood of a large one has often become very conspicuous, so as to bear a certain...appearing and disappearing alternately as often as you please.11 I may illustrate this by an observation of my own, made some months since, with a 3 feet...
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The Edinburgh Journal of Science, Volume 5

Science - 1826
...eye to another part of the field : in this way, a faint star in the neighbourhood of a large one has often become very conspicuous, so as to bear a certain...disappear, as if suddenly blotted out, when the eye \s turned full upon it, and so on, appearing and disappearing alternately as often as you please."...
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The London Encyclopaedia: Or, Universal Dictionary of Science ..., Volume 16

Thomas Curtis - Encyclopedias and dictionaries - 1829
...faintness, has often been resorted to, viz. to direct the eye to another part of the field. In this way a faint star, in the neighbourhood of a large one,...disappearing alternately, as often as you please, fne lateral portions of the retina, less fatigued by strong lights, and less exhausted by perpetual...
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The Edinburgh Journal of Science, Volume 3

Science - 1826
...measure of the angle of position. They directed the eye to another part of the field. In this way, a faint star in the neighbourhood of a large one will...appearing and disappearing alternately, as often as we please. The small companion of 23 (h) Ursa? Majoris, is a remarkable instance of this, and also...
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The Edinburgh Journal of Science, Volume 5

Science - 1826
...eye to another part of the field ; in this way, a faint star in the neighbourhood of a large one has often become very conspicuous, so as to bear a certain...disappearing alternately as often as you please." I may illustrate this by an observation of my own, made some months since, with a 3^ feet achromatic...
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A Treatise on Optics...: First American Edition, with an Appendix ...

David Brewster, Alexander Dallas Bache - Light - 1833 - 95 pages
...viz. to direct the eye to another part of the field. In this way, a faint star, in the neighborhood of a large one, will often become very conspicuous...disappearing alternately as often as you please. The lateral portions of the retina, less fatigued by strong lights, and less exhausted by perpetual attention,...
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A Treatise on Optics

David Brewster - Light - 1837 - 95 pages
...viz. to direct the eye to another part of the field. In this way, a faint star, in the neighborhood of a large one, will often become very conspicuous...blotted out, when the eye is turned full upon it, and-so on, appearing and disappearing alternately as often as you please. The lateral portions of the...
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The Book of Human Character, Volume 1

Charles Bucke - Anecdotes - 1837
...that the water, and the under part of his hand, looked green f; and Herschel assures us, that though a faint star in the neighbourhood of a large one will often become very conspicuous ; yet that it will totally disappear to the eye when it is turned full upon it, and thus appearing...
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A Treatise on Optics

David Brewster - Light - 1841 - 418 pages
...viz. to direct the eye to another part of the field. In this way, a feint star, in the neighborhood of a large one, will often become very conspicuous;...disappearing alternately as often as you please. The lateral portions of the retina, less fatigued by strong lights, and less exhausted by perpetual attention,...
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