What hides this stereogram?
[3360] What hides this stereogram? - Stereogram - 3D Image - #brainteasers #stereogram #3Dimage
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What hides this stereogram?

Stereogram - 3D Image
#brainteasers #stereogram #3Dimage
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Kings birthday

Many years ago, in the south pacific, there was a small island kingdom that was ruled by a kind and benevolent King. Each year, on the King's birthday, the residents of the island gave the King a new throne as token of their love and respect for him.

And each year, the King would put last years gift up in the attic of his small grass house. After many years of ruling the island, the weight of the large number of birthday presents stored up in the attic became too heavy and caused the house to collapse down on the King.

Moral to the story is: He who lives in grass house, shouldn't stow thrones.

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Tungsten filaments

In 1913, Dr William David Coolidge patented (U.S. No. 1,082,933) a method for making ductile tunsten for the purpose of making filaments for electric lamps. When Coolidge joined the General Electric Research Laboratory (1905), he was given the task of replacing the fragile carbon filaments in electric light bulbs with tungsten filaments, although tungsten was difficult to work. He developed a way to superheat the metal tunsten in order to draw it out into the fine threads used for lamp filaments. Coolidge then improved the X-ray tube by using a heated tungsten filament cathode in vacuum producing electrons, instead of residual gas molecules in the tube. This permitted higher operating voltages, higher energy X rays and the treatment of deeper-seated tumors.
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