See full ranking list
short ranking list
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.
A woman starts dating a doctor. Before too long, she becomes pregnant and they don't know what to do. About nine months later, just about the time she is going to give birth, a priest goes into the hospital for a prostate gland infection.
The doctor says to the woman: "I know what we'll do. After I've operated on the priest, I'll give the baby to him and tell him it was a miracle."
"Do you think it will work?" she asks.
"It's worth a try," he says.
So, the doctor delivers the baby and then operates on the priest. After the operation he goes in to the priest and says: "Father, you're not going to believe this."
"What happened?" asks the priest.
"You gave birth to a child!"
"But that's impossible!" says the priest.
"I just did the operation," insists the doctor. "It's a miracle! Here's your baby."
About 15 years go by, and the priest realizes he must tell his son the truth. One day, he sits the boy down and says: "Son, I have something to tell you. I'm not your father."
The son says: "What do you mean, you're not my father?"
The priest replies: "I am your mother. The archbishop is your father."