- 52 - electrons into account, a greater penetration depth compared to the normal skin-effect is possible. This depth of penetration is given through the thermalisation of the penetrating electro-magnetic energy through the conductor electrons. The difference compared to the normal skin-effect is only just visual. The introduction of an electro-magnetic wave of an accordingly weak intensity induces the electrons to resonate. These electronic oscillations do however only represent a minute disturbance of the stochastic movement of the electrons due to their own thermic movement. No coherence between the oscillating electrons ensues in this way and the extinguishment of the incidental waves through interference cannot take place in such a case, because the portions of the oscillating electrons average out in regards to time and space. This is only to show that the possibility of spreading electro-magnetic energy over large distances through metallic conductors and under the noise level certainly exists. This would mean that electro-magnetic energy cannot simply be completely screened through metallic conductors as previously assumed. Screening within the framework of the skin-effect is naturally possible. This can however only function up to the noise level. The spreading of electro-magnetic energy inside the noise level is certainly possible. One has to admit that these aspects for the transmission of signals and information could be of the greatest importance. The thoughts and possibilities touched upon so far can however only gain importance, if extremely narrow-band receivers for electro-magnetic energy are available that can register the extremely weak signals below the thermal noise level. These results, they can possibly open up new accesses to completely novel and yet to be assessable regions of human knowledge, will gain considerably pertinence when one considers that biological aspects must be taken into consideration here also. The generation and the absorption of electromagnetic energy of such a minute intensity within the corresponding frequency range is also possible in the molecular structure of the cell and it could possibly have played a not to be underestimated role in the evolution of life. If one takes the work on this subject published in the USSR into consideration, the possibility of the transference of information between cells through electro-magnetic waves is there. The development of a science in the border region between physics, psychology and biology rears its head here, one that will surely be allocated a central role in twenty years from now.
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