McIntosh apples respired 1/3 as fast in controlled-atmosphere storage at 40[degree] F as in ordinary cold storage at 32[degree]. The residual effect of controlled-atmosphere storage on apples after their removal to high temps. can be partially explained by a reduction in respiration rate following the storage treatment. The residual effect cannot be accounted for by persistence of a high CO2 level in the tissues of the fruit. Mclntosh held in cold storage at 32[degree] F evolved 2 1/2-3 times as much CO2 during the same time period in storage as controlled-atmosphere fruit. The value and limitations of cumulative respiration curves for this type of study are indicated.