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A list of the determinations in this work is given below:
- Under standard conditions with a photoperiod, the generationtime is five days. The generation time is shorter in continuouslight.
- There are temperature-dependent cleavage and mitoticgradientswithin a colony.
- A diurnal peak of mitosis occurstwo hours before the onsetof darkness.
- Under standard conditions(a) the mitotic index rises to a maximumof 10 per cent, twodays after inoculation; (b) the mitotictime is ten minutes;and (c) the mitotic rate is 71 cells per103cells per hour atthe mitotic peak.
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