William H.F. Talbot .
William Henry Fox Talbot was an English physicist and also a pioneer in photography. He is responsible for discovering the calotype process in photography.
William Henry fox talbot
calotype
1841
calotype
Hey Mr. Foo's Student,The answer to this is:Negatives, and the calotype process.Have fun, it's a great class.
Leitz
The invention of photography is subject to some debate. Joseph Nicephore Niepce(1765-1833) created the first photograph on a glass plate using a camera obscura in 1826. His associate Louis Daguerre(1787-1851) invented the worlds first widely used photographic process, known as the Daguerreotype in 1839. At the same time in England, William Fox Talbot (1800-1877) was attempting to create a permanent record of an image, he announced his calotype process in 1841. The English claim to have truly invented photography since Fox Talbots's was the first negative-positive process from which any number of prints could be made.
It's used to make black and white photos. http://en.wikipedia.org/wiki/Calotype
A calotype is another name for a talbotype - an early photograph produced on paper and coated with silver iodide.
observatuion
photography