Scientific Book " Das Hydrosulfit - Grundzuge der physikalischen Chemie des Hydrosulfits " - "The hydrosulfite - fundamentals of the physical chemistry of hydrosulfite" published in 1921 , 181 pages. A book that was part of the scientific library of the IG Farben in Auschwitz III Monowitz concentration camp complex where thousands of Jews and other prisoners were used as slave labour It has some ink stamps of the IG Farben Auschwitz III camp and also IG Farben Buna stamp.