1. In dealing with Russian names, the Chemical Abstracts convention has been used, with the single exception of the name of Tswett (correctly “Tsvet”) himself. The German transliteration of his name, Tswett, is widely found in the literature and has been adhered to here, unless Tswett himself signed a particular letter otherwise.
2. New data on M.S. Tswett's life and work
3. It is possible that Claparède's letters were among the few most cherished items that Tswett saved before evacuation from Warsaw and carried with him until his death. The bag containing some letters, some of Tswett's manuscripts, samples of substances and photographs was then left by his widow to the family of his sister, Nadezhda S. Lyashchenko, and kept by his niece, the late E. A. Lyashchenko until the evacuation from Moscow during World War II of the Timiryazev Agricultural Academy, where she was employed. She succeeded in saving only the photographs that later accompanied the biographies written by Sakodynskii3,4,7,8 and by Senchenkova9 and were displayed at the Tswett Memorial Chromatography Symposium in Leningrad in May 1972.