Abstract
Summary and Conclusion
1. It has been demonstrated with a fair degree of certainty (0.05 > Pdiff > 0.02) that three weekly exposures of 144 r followed by a 30 day rest period increases the resistance of mice to a subsequent lethal dose of x-radiation.
2. It is concluded that no adequate explanation for this phenomenon of increased tolerance to x-ray radiation is available at the present time.
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