[en] In the previous study of some stony meteorites and geothermal waters the multiple emission of neutrons was observed which might have arisen from spontaneous fission of superheavy elements (SHE). In this connection it is of interest to search for terrestrial samples in which an increase of concentration of the sought nuclide might have occurred in comparison with meteorites, which are the least differentiated substance in the solar system. The search can be carried out by means of a setup of weight 1 t. The detection of multiple emission of neutrons from samples of this weight permits observation of an admixture of SHE with a sensitivity 10^-15 g/g with a length of measurement 20 days. The development and operation of this setup will permit analysis of an additional approach to the experimental problem of nuclear decays due to nonconservation of baryon number (the decay of the nucleon and the annihilation nN resulting from the oscillation of a neutron bound in the nucleus)