The practical astronomer : comprising illustrations of light and colours, practical descriptions of all kinds of telescopes, the use of the equatorial-transit, circular, and other astronomical instruments, a particular account of the Earl of Rosse's large telescopes, and other topics connected with astronomy (1845)
Dick, Thomas, 1774-1857 · London : Seeley, Burnside, and Seeley · leaf 142
produced, by the heatof the poker, in the density of the air. He alsosuggested the following experiment as anotherillustration of the same principle, namely, viewingan object through a stratum of spirit of wine lying ON THE REFLECTION OF LIGHT. 117 above water, or a stratum of water laid above… … word * Syrup, on a card held behind the bottle,appeared erect when seen through the pure spirit,but inverted, when seen through the mixture ofwater and syrup. He afterwards put nearly thesame quantity of rectified spirits of wine abovethe water, as seen at B, and he saw the appearanceas…
Astronomy · Astronomical instruments · Telescopes
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