We are … the un-proud non-possessors of objects whose chief substance is that of the transient symbol. Our Puritan fear of the love of things turns out to have been groundless after all, for we do not love things or even possess them: they pass through our lives as barium passes through the digestive tract, unassimilated, their function merely to flash signals along the way.
O. Hahn and F. Strassmann have discovered a new type of nuclear reaction, the splitting into two smaller nuclei of the nuclei of uranium and thorium under neutron bombardment. Thus they demonstrated the production of nuclei of barium, lanthanum, strontium, yttrium, and, more recently, of xenon and caesium. It can be shown by simple considerations that this type of nuclear reaction may be described in an essentially classical way like the fission of a liquid drop, and that the fission products must fly apart with kinetic energies of the order of hundred million electron-volts each.