What hides this stereogram?
[6343] 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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Working in The Garden

A prisioner in jail received a letter from his wife:
"I have decided to plant some lettuce in the back garden. When is the best time to plant them?"
The prisioner, knowing that the prison guards read all the mail, replied in a letter:
"Dear Wife, whatever you do, DO NOT touch the back garden! That is where I hid all the gold."
A week or so later, he received another letter from his wife:
"You wouldn't believe what happened. Some men came with shovels to the house, and dug up the whole back garden."
The prisoner wrote another letter:

"Dear wife, NOW is the best time to plant the lettuce!"

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Phototransistor

In 1950, the invention of the phototransistor was announced. This was a transistor operated by light rather than electric current, invented by Dr. John Northrup Shive of the Bell Telephone Laboratories at Murray Hill, N.J. It used a tiny chip of germanium, a semiconductor material, but only a single collector wire. The tip of this wire rests in a small dimple ground into one side of the germanium disk. At this point the germanium disk is only three thousandths of an inch thick. Light focussed on the opposite, un-dimpled side of the disk can control the flow of current in the wire, thus making a control device similar in function to a photo-electric cell.
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