Abstract
The fate of HeLa cells irradiated with X-rays and fast neutrons was followed by cine and continual photographic procedures. The following interestings were made through detailed analysis of the films.
(1) No differences could be observed between X and neutron irradiated cells as to the types of cell abnormalities as well as modes of cell disintegration.
(2) Cell fusion played an important role in reproductive cell death. Furthermore, cell fusion was observed between cells other than sisters, cousins, aunts or nieces.
(3) In the pedigree of cells with colony-forming ability, these was a tendency for both cell death and normal cell division to occur in clusters of closely-related cells.
