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Of all those whose names are associated with the invention of photography, Louis Daguerre is perhaps the most famous. He started out as a student of architecture, but by the age of sixteen was working as a stage designer and his work in this field, especially his handling of lighting effects, brought him to fame. His interest in photography grew out of his use of the camera obscura to help with perspective in painting and his desire to freeze the image. To this end, he formed a partnership with the photographer Nicephore Niepce - but this was short-lived as Niepce died not long after. Daguerre continued to experiment and made, it seems by accident , an important discovery: he had put an exposed photographic plate - this was, of course, before the age of film - in his chemical cupboard and some days later found that the latent image had developed. There was also a broken thermometer in the cupboard, and he assumed that the vapour from the mercury had caused it. This meant it was now possible to reduce the time the plate was exposed from eight hours to thirty minutes. This produced an image. The next step was to fix it, which he managed to do in 1837. He called this new process the Daguerreotype, then advertised and looked for sponsors, but initially very few people were interested. The discovery was made public in January 1839, but details of the process were not given until August the same year, the French government in the meantime having bought the rights to the process.
