Professor P. Cleve to S. Arrhenius: "You have got a new theory!.... Farewell to you. I do not know you any longer!" [B. Kazakov, Transformation of elements, Moscow, Znanie, 1977].
The paper describes some unusual facts obtained in experiments with neutrons of energies from thermal to 30 keV. These facts demonstrate that when in certain structures or after some interactions, neutrons, protons, and deutons acquire unusual properties and space forms. Some indications are obtained that nuclear forces can nontrivially be employed to change the properties of solids.