THE RUDOLF REPORT

GERMAR RUDOLF · THE RUDOLF REPORT– According to contemporary literature, devices for the detection ofHCN residues were called “Blausäurerestnachweisgeräte” (HCNresidue detection devices) or “Gasrestnachweisgeräte für Zyklon”(Gas residue detection devices for Zyklon). 128 Since the Topf &Söhne corporation according to the letter had already received informationon the possibility of procurement of such devices fromthree firms, the correct name of these devices must in the meantimehave penetrated even to Topf & Söhne.– Furthermore, these detection devices are based on a wet chemicalmethod which possessed no “indicator” and could not, therefore,be designated as indicator devices. On the other hand, the gas testersmentioned in the telegram had a physico-chemical sensor connectedto a dial (see Fig. 35).– According to contemporary prescriptions, testing with HCN residuetesting devices was obligatory in every disinfestation actionusing hydrogen cyanide in order to test whether the ventilation ofa fumigated room had been successful before it could be enteredwithout a gas mask. Since disinfestation had been performed on alarge scale in Birkenau since 1941, it is absolutely incredible thatno one should have concerned himself with the possibility of or-Fig. 35: Photograph of two indicator devices from theSiemens corporation for the CO 2 and/or CO+H 2 - gascontent in %. Component of a gas tester. 240VffG 2(1) (1998), pp. 13-22 (online: www.vho.org/VffG/1998/1/Mattogno1.html).240 Alberto Cantagalli, Nozioni teorico-pratiche per i conduttori di caldaie e generatori di vapore,G. Lavagnolo Editore, Turin 1940, p. 308; taken from C. Mattogno, op. cit. (note 239),112