Talbot. William H. Fox Talbot: Inventor of the Negative-Positive Process by Andre Jammes.

Collier, 1973. First American Edition. Wraps, 96 pages, 71 illustrations. Thorough treatment of the range of Talbot's experiments and photographic oeuvre. Issued in series, Photography: Men and Movements.  Fine. Not issued with ISBN number.

Note: On January 25, 1839, the Englishman William Henry Fox Talbot made public his photogenic drawing process which produced negatives on paper.  Since 1834, Talbot had been “sensitizing writing paper by dipping it in a solution of sodium chloride [salt water] and coating one side with silver nitrate, a compound which quickly turns dark when exposed to sunlight. An impression of an object was then made by placing it on the sensitized side of the paper and exposing it to the sun.”  Talbot also began using the process to make images with a small camera he called a “mousetrap.”  Talbot’s invention was the precursor to his calotype process (1840-1841), which employed additional chemicals to increase light sensitivity and became the first widely used photographic process on paper. (Reference: Salt Prints at Harvard webpage)