A customer walked into a bar and said, “I’ll have a pint of less, please.”
“Less?” queried the bartender. “What’s that?”
“I don’t know either,” said the customer, “but my doctor told me to drink less.”
Henry Fox TalbotDied 17 Sep 1877 at age 77 (born 11 Feb 1800).William Henry Fox Talbot was an English inventor, mathematician, chemist, physicist, philologist and Egyptologist who invented the negative-positive photographic process. He improved the discovery by Thomas Wedgwood (1802) that brushing silver nitrate solution onto paper produces a light-sensitive medium able to record negative images, but Wedgewood was unable to control the darkening. In February 1835, Talbot found that a strong solution of salt fixed the image. Using a camera obscura to focus an image onto his paper to produce a negative, then - by exposing a second sheet of paper to sunlight transmitted through the negative - he was the first to produce a positive picture of which he was able to make further copies at will. His Pencil of Nature (1844) was the first photographically illustrated book. |
