Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Warren T. Thompson (active 1840 - 1870) was an American photographer. Between 1840 and 1846 he worked in Philadelphia. He also worked in Paris.In 1843 Thompson refined Daniel Davis Jr.'s electroplating method for colouring daguerreotypes by using a gum tragacanth resist. With this technique colours could be built up in the manner of some types of printmaking.

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