Alexander Konstantinovich Erzhemsky
1845 - 1905 (Petersburg)
Author of many studies on photography during late XIX-early XX centuries. In 1898 he was invited to teach at the photographic courses established by Prokudin-Gorsky. He chaired the meeting of the Fifth Section of the Imperial Russian Technological Society in December 1902, when Prokudin-Gorsky made his first report on the manufacturing of color transparencies.