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Frederic Eugene Ives

Born 17 Feb 1856; died 27 May 1937 at age 81.American photographer and inventor of the halftone process, a method of reproducing photographs on a printing press. Prior to this process, photos and illustrations were reproduced from hand-engraved plates. In this way printers could reproduce line drawings, but not the shades of gray in a photograph because printing presses cannot print gray - only black and white. Ives invented a screen that would convert a photograph into a pattern of tiny dots. Large dots form where the image is dark, and tiny dots where the image is light, thus giving the illusion of shades of gray. In 1881, he was the first to make a three-colour print from halftone blocks. Further inventions in photography and colour printing yielded 70 patents.(Image: 1996 U.S. postage stamp.)

A famous sexologist was giving...

A famous sexologist was giving a lecture in front of a big crowd.
"There are 4 kinds of men when it comes to sex. The first kind does it every day. You can usually recognize him by his masculine body and the constant smile on his face. Do we have anyone like this in the audience?"
A man got up from the audience and he fitted the description: Big firm body with a smile on his face.
"Then there is the second kind. They have sex once a week. They also have a generally happy mood, and look pretty good, but of course not as good as the first kind. Is there any one of them here tonight?".
A second man got up, and he too fitted the description.
"The third kind do it once a month. They are chubby and usually grumpy. Anyone of them here?".
The man that raised from his chair looked exactly like the expert claimed.
"And then there is the 4th kind. They do it once a year. They usually have a big belly, but the thing that is most tipical is that they are in a constant state of depression. I know it would be hard for him to admit, but if there is one of those in the audience, please rise".
A fat and short man stood up, but in contrary to the experts prediction, he looked very cheerful.
"You do it only once a year?" the expert asked.
"Yes, only once a year."
"So why are you so happy?" demanded the expert.
"Well", said the man, cheeringly, "Tonight is the night!"
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