Bananas were ripened under the same conditions as in the earlier experiments. They were taken off the car as they arrived green in Minneapolis, and the individual "fingers" were separated from the hands and washed. 4.46 kg. of fruit were arranged on a wire stand over which was placed a bell-jar with a capacity of 14.8 liters. Within the bell-jar was a vessel holding 100 ml. of 7.5 ? sodium hydroxide solution to absorb any carbon dioxide produced. The carbon dioxide absorbed was replaced by oxygen under low constant pressure from a gasometer, thus maintaining approximately normal atmospheric conditions under the bell-jar while permitting the collection of emanations. The whole was kept in a room where the temperature varied from 18? C. to 19? C. At the end of each day the fruits were uncovered and allowed to air for about an hour.