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Journal of Agricultural Research 



Vol. XVI, No. 8 



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Fig. II. — Graphs showing the relation of carbon dioxid to apple-scald production. The percentage of 

 scald is shown by the length of the bars, and each group of bars (A, B, etc.) represents a particular experi- 

 ment. In cases where the air was kept at a practically constant composition by renewal, the fresh air with 

 or without carbon dio.xid was introduced continuously at a rate such that a volume of air equal to that of 

 the container was carried in once in 24 hours. In cases jvhere the air was stirred, the circulation was accom- 

 plished by means of a rotary air pump. The air was kept practically saturated with moisture in all of the 

 experiments. Five apples were used in each test. 



A. The apples used in the experiment were of the lot described in the legend for figure 5. They were 

 held In sealed jars with air slowly renewed. The results were obtained after 6 weeks storage at 15° C. 



B. Same treatment as in (A), but the air was circulated constantly with an air pump. In (a) and (b) 

 the air was slowly renewed but in (c) and (d) the circuit was entirely closed. In (c) the air was circulated 

 over soda lime and water and in (d) over water only. 



C. Apples of the lot described in the legend for figure 5 but held in cold storage 8 weeks before starting 

 the experiment. The results were obtained afters weeks storage at 15° C. (a) Jar as moist chamber with 

 a Ja-inch hole in the top. (b) as in (a) but with jar inverted placing the hole at the bottom, (c) As in (a) 

 but with soda lime and water in the bottom of the jar. 



D. The apples used in the experiment were of the lot described in the legend for figure 3. [The apples 

 were held in sealed jars with air renewed slowly.] The results were obtained after 8 weeks storage at 15° C. 



E. Same treatment as in (D) but air circulated constantly with an air pump. 



F. Same treatment as in (D)but ato^C. for 16 weeks. 



G. The apples used in the experiment were of the lot described in the legend for figure 9. They were 

 stored at 2'^° C. in sealed boxes with the air slowly renewed and also stirred with an air pump. The results 

 were obtained after 20 weeks storage. 



_H. Same treatment as in (G) but with the apples held at 0° C. for 20 weeks, stored in sealed jars with 

 air renewed slowly but not stirred. 



I. The apples used in the experiment were of the lot described in the legend for figure 10. They were 

 stored at 23^° C. in sealed boxes with the air slowly renewed and also stirred with an air pump. The results 

 were obtained at the end of 20 weeks. 



J. Same treatment as in (I) but the apples held at 0° C. for 20 weeks stored in sealed jars with air renewed 

 slowly but not stirred. 



