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IOWA ACADEMY OF SCIENCE Vol. XXVI, 1919 



By examining the data and the graph, figure 97, it is plainly 

 discernible that absorption is the most rapid at the beginning, 

 being 18.83 per cent at the end of the first hour; from that point 

 there is a gradual increase until the maximum, 41.47 per cent at 

 the fourteenth hour is attained. At no subsequent period is there 

 as high a percentage registered. 



As far as the percentage germination is concerned there is no 

 recognized drop until after the seeds have been exposed to formal- 



FiG. 97. — Diagram showing absorption and germination of wlieat. 



dehyde for a period of twenty-six hours. Although at the thirty- 

 first hour the percentage germination rises again and is higher than 

 for some of the earlier periods, yet it does not attain a percentage 

 as high as has been delineated. However, there is a decided drop 

 from the thirty-first hour. At the end of thirty-six hours the per- 

 centage of germination is only 83.5. It is regrettable that the series 

 was not carried on further. Even though this feature of the experi- 



