First, the name. We owe the name "Photography" to Sir John Herschel, who first used the term in 1839, the year the photographic process became public. The word is derived from the Greek words for light and writing.
Before mentioning the stages that led to the development of photography, there is one amazing, quite uncanny prediction made by a man called de la Roche (1729-1774) in a work called Giphantie. In this imaginary tale, it was possible to capture images from nature, on a
canvas which had been coated with a sticky substance.1 This surface, so the tale goes, would not only provide a mirror image on the sticky canvas, but would remain on it. After it had been dried
in the dark the image would remain permanent. The author would not have known how prophetic this tale would be, only a few decades after his death.
There are two distinct scientific processes that combine to make photography possible. It is somewhat surprising that photography was not invented earlier than the 1830s, because these processes had been known for quite some time. It was not until the two distinct scientific processes had been put together that photography came into being.
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