The Artificial Rainbow
Opposite a window into which the sun shines direct suspend a glass
globe, filled with clean water, by means of a string that runs over a
pulley, so that the sun's rays may fall on it. Then drawing the globe
gradually up, you will observe, when it comes to a certain height, and
by placing yourself in a proper situation, a purple colour in the
glass; and by drawing it up gradually higher, the other prismatic
colours, blue, green, yellow, and red, will successively appear; after
which, the colours will disappear, till the globe is raised to about
fifty degrees, when they will again appear, but in an inverted order,
the red appearing first, and the blue or violet last; on raising the
globe a little higher, they will totally vanish.
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Singular Impression On The Visual Nerves By A Luminous Object
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When a card has been drawn, you place it under the long card, and by shuffling them dexterously, you bring it to the top of the pack. Then lay or throw the pack on the ground, observing where the top card lies. A handkerchief is then bound round you... The Card Hit Upon By The Guess
Spread part of the pack before a person, in such way that only one court card is visible; and so arrange it, that it shall appear the most prominent and striking card. You desire him to think on one; and observe if he fix his eye on the court card. ... The Card In The Egg
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