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Photography - Discovery

( Originally Published Early 1900's )[an error occurred while processing this directive]

Photography. The action of light on chloride of silver was known as early as the sixteenth century. The phenomenon was studied by Scheele (1777), Senebier (1790), Ritter and Wollaston (1801). From the results of these investigations, experiments were made by Thomas Wedgwood and Humphry Davy, which were published, 1802. Wedgwood may be regarded as the first photographer. His paper was entitled "An Account of a method of copying paintings upon glass, and of making profiles by the agency of light upon nitrate of silver." Further discoveries were made by Niepce in 1811, and by Sir J. Herschel in 1819. Daquewe commenced his experiments in 1824; and in 1820 joined Niepce, and worked with him till the death of the latter in 1833. In 1839, Henry Fox Talbot first published his mode of multiplying photographic impressions, by producing a negative photograph (i. e., with the lights and shades reversed), from which any number of positive copies may be obtained. His patent is dated February, 1841. From this time improvements have been made with great rapiddity.

Celestial photography began with Professor Bond, the astronomer, of Cambridge, Mass., in 1851. It was greatly improved by Dr. Draper in 1859 to 1881, and by others more recently.



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