THE RUDOLF REPORT

8. EVALUATION OF CHEMICAL ANALYSES2. Furthermore, expert literature is detailed in thata. hydrogen cyanide is a extremely mobile chemical compoundwith physical properties comparable to water, 322b. which can quite easily penetrate through thick, porous layerslike walls. 4093. In addition, it is generally known that cement and lime mortar arehighly porous materials, comparable for instance with sponges. 517In such materials, there does not exist something like a definedlayer of 0.01 mm beyond which hydrogen cyanide could not diffuse,as there can also be no reason, why water could not penetratea sponge deeper than a millimeter. Steam, for example, which behavesphysically comparable to hydrogen cyanide, can very easilypenetrate walls.4. Finally, the massive discolorations of the outside walls of the disinfestationchambers in Birkenau and Stutthof, as shown in thisexpert report, are clearly visible and conclusive evidence for thefact how easily hydrogen cyanide and its soluble derivatives canpenetrate such walls.As a professor of analytical chemistry, Prof. Roth must know this,so one can only wonder why he spreads such outrageous nonsense.That Prof. Roth is indeed a competent chemist can be seen from whathe said during his testimony under oath as an expert witness during theabove mentioned Zündel trial: 518“In porous materials such as brick or mortar, the Prussian blue[recte: hydrogen cyanide] could go fairly deep as long as the surfacestayed open, but as the Prussian blue formed, it was possible that itwould seal the porous material and stop the penetration.”517 DIN 4108, part 3 to 5, deals with diffusion of steam into building materials. The most importantcoefficient for building materials is the so-called coefficient of diffusion resistance; this isa dimensionless number indicating, how much longer the diffusion of steam takes to penetratea layer of certain materials compared to the time it takes to diffuse through the same layer ofstill air. This coefficient is valid not only for water vapor, but also for gaseous hydrogen cyanideas well as for any other gas. In the list of 100 different building materials compiled inDIN 4108 part 4, one can find lime and cement mortar with diffusion resistances from 15 to35, in which case the resistance grows with increasing cement content, for gypsum plaster, thecoefficient is 10, for brick walls 5 to 10, for glass wool mats it is 1. That means, if a gas diffusesthrough a layer of still air with a speed of 1 cm per second, it does take 15 to 35 secondsto diffuse through a 1 cm thick layer of lime or cement mortar and 5 to 10 seconds to diffusejust as deep into a brick wall. (I am grateful to Mr. C.H. Christmann for this reference.) In thisregard, compare also the analysis about the porosity of masonry, graph 7, p. 183.518 B. Kulaszka (ed.), op. cit. (note 25), p. 363 (protocol p. 33-9291).275