Aug. 2, 1920 Daily Development of Kernels of Hannchen Barley 397 



EXPERIMENTAL MATERIAL 



Most of the data presented herein were obtained in 191 7, but many 

 of the graphs contain curves of the data for 191 6 as well. The curves 

 for 1 91 6 are added merely for comparison and to give an idea of the 



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Fig. 2. — Graph showing percentage of moisture per kernel from date of flowering. The broken line gives 

 the data for 1916, the sohd line the data for 1917. 



range of annual fluctuations. The larger growth in 191 6 was due, 

 doubtless, to the more generous application of water in that year. The 

 plots were in flower a week earlier in 191 6 than in 191 7 and may have 

 had some advantage of season. In figure 3 the maximum and mean 

 temperatures for the two years are shown. These are of interest later 

 in their relation to daily fluctuation. In both years the barley was 



