| Description | Letter from J B S Haldane to G L Brown, Chairman of the Underwater Physiology Sub-Committee, asking if it would be possible for K W Donald to send Haldane the results of his own experiments on the effect of carbon dioxide on oxygen tolerance. Encloses handwritten and typewritten copies of an essay titled "The Effect of Previous Exposure to Carbon Dioxide on Poisoning by High Pressure Oxygen", and a handwritten copy of the letter to Brown. |