John Herschel (John Herschel) (March 7, 1792 – May 11, 1871) mathematician and astronomical British who invented the process Sayyaf phenotypic (Cyanotype) as the blueprint for a process template (Blue Print) that are used in the development of the blueprint or carbon copy paper, typewriter used in pat chup.Now because those recordings must be handwritten, and if you need a duplicate copy, copy to the same. Make more time to Herschel, trying to think of how to make a copy of it. In a photograph as a guide, the portal bot. Who invented the process photography Portal bot thathai (or call in another bawanekathif that the content!), use "Hi," in order to maintain the fixed installation images. In the first era of maintaining it uses brine in order to remain. Furthermore, as the words are used in photography is the word "photograph" and "negative" and "positive," he said. John Herschel, son of William Herschel, astronomer who discovered Uranus.
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