"There came before us Mr. (not then Sir William) Crookes' discovery of what he called 'radiant matter,' . . then Rontgen's rays . . . until now M. Gustave Le Bon" [The evolution of Matter, page 31]
See Also
Apparatus for the Utilization of Radiant Energy - 685957
Contractive Electricity vs Radiant Magnetism
dissociation of matter
Figure 16.07 - Magnetism is Radiant while Electricity is Concentrative or Assimilative
Fission
Radiant Energy
Radiant heat
Radiation
Radioactive
Radioactivity
transformation of matter into energy