A note on Puck and Steffen's equations for the life cycle analysis of mammalian cells

The equations given by Puck and Steffen (1963) are derived from the age density function of the population being studied. The results differ somewhat from those of Puck and Steffen, but, on the whole, their procedure and their conclusions in analyzing the life cycle by means of colcemide and tritiated thymidine remain valid.