THE RUDOLF REPORT

7. ZYKLON B FOR THE KILLING OF HUMAN BEINGSTable 13: Quasi-stationary concentrations of HCN in masonry in percentof saturation, as a function of daily exposure time to HCNtime insulated not insulated, averagfacenot insulated, on sur-14.4 min 1.6% 0.8% 1.6%72 min 7.9% 4.2% 7.8%6 h 30.9% 16.2% 30.6%12 h 56.1% 29.8% 56.2%erage concentration profiles of the insulated wall model is constant, itis linearly decreasing in the non-insulated walls from the inside out.The maximum average values close to the inner, HCN-exposed surfaceare quite comparable to the respective constant average concentrationsin the insulated cases.I have emphasized the values of particular interest: In case ofhomicidal gassings in the morgues 1 of crematoria II and III (withoutZyklon B introduction columns), the walls will reach a quasi-stationaryconcentration of 8% of their saturation concentration. In case of disinfestationchambers, the value given for 6 hours of exposure to a constantHCN concentration—corresponding to a round-the-clock operation—leadsto ca. 16% for the average value of the entire wall, andsome 30% for the surface.The values under consideration here are percent values of the saturationconcentration of a wall, i.e., relative values. The cases of thedisinfestation and homicidal ‘gas chamber’ are only correctly comparablewhen one considers the absolute hydrogen cyanide concentrationsin the masonry. If, for example, one considers that, in particular,the interior walls of the disinfestation chambers intended for personaleffects were warm, dry walls, while the alleged homicidal ‘gas chambers’in crematoria II and III were cool and very moist, then, withequal gassing concentrations, one must multiply the relative concentrationsof the homicidal ‘gas chamber’ by the factor of the increased hydrogencyanide absorption capability of cool, moist walls. If one assumesthe value of 8 determined in this regard on page 187, then theabsolute average hydrogen cyanide content of the homicidal ‘gaschamber’ would be a value lying around 64% of the saturation concentrationof a warm, dry wall in a disinfestation chamber, i.e., four timeshigher than the average hydrogen cyanide content of the disinfestationchamber wall (ca. 16%), and more than twice as high as its maximumcontent at the surface (ca. 30%). Even when assuming the existence of229