An exhibition of rarely seen images from the British Library's photographic collection will go on show in October. It will include work from pioneer William Fox Talbot, who invented the calotype process in 1840.
Historic moments in the 19th Century, such as the arrival of the first hippopotamus on British shores, were captured by the early photograhers. Don Juan Carlos, Duke of Montizon, made many natural history studies.
Anna Atkins produced hundreds of 'photograms' of algae specimens, using the vivid blue cyanotype process.
Whilhelm Rontgen's discovery of X-rays in 1895 brought a new dimension to photography.
Alice Kerr's striking portraits are thought only to exist in the British Library's collection.
The exhibition also looks at the early development of "celebrity" photography, such as this portrait of Oscar Wilde.
The exhibition, called Points of View: Capturing the 19th Century in Photographs, runs from 30 October, 2009 to 7 March, 2010.
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