A man offers a girl in his office $1,000 to sleep with him. “I’ll put the money on the floor, you bend down, and I’ll be done by the time you pick it up,” he explains.
The girl consults her boyfriend who advises her to go ahead but to pick up the money really fast. Having not heard anything for an hour, the boyfriend calls her back.
“I can hardly walk, let alone make a phone call,” the girl says.
“What happened?” her boyfriend asks anxiously.
“He used $1 bills.”
XerographyIn 1938, xerography was demonstrated by Chester F. Carlson. With his assistant, Otto Kornei, Carlson used a sulphur coating on a zinc plate, vigorously rubbed with a handkerchief to apply an electrostatic charge. A glass slide was prepared using India ink to write "10-22-38 ASTORIA," then laid on the sulphur surface in a darkened room. After illuminating them with a bright incandescent lamp for a few seconds, the slide was removed. When lycopodium powder was sprinkled on the sulphur surface and blown off, there remained a near-perfect image of the writing. Permanent copies were made by transferring the powder images to wax paper and heating the sheets to melt the wax. Xerox is a term coming from "xerography" which means dry writing and is a trademark. |
