“…In the earlier experiments accumulation of carbon dioxide had of course been accompanied by a corresponding depletion of oxygen. Kardos & Blood (1947) retarded the sprouting of potatoes stored in wooden barrels by allowing respiratory carbon dioxide to accumulate to approximately 12 %, there being sufficient ventilation to prevent further accumulation. In other experiments, the respiratory carbon dioxide was supplemented from a cylinder of compressed gas, and in yet others concentrations of 7-6 and 10-5 % carbon dioxide were maintained by the interaction of diffusion from the barrels and a continuous How of carbon dioxide from a cylinder.…”