Brenchley . — The Development of the Grain of Barley . 907 
is obtained by a recalculation of results so as to indicate the proportion of 
nitrogen in the dry matter that entered the grain between successive dates. 
Owing to the accumulation of small experimental errors, the results are 
somewhat erratic, but are sufficient to point out that dry matter stored in 
the later periods is richer in nitrogen than in the earlier periods, a fact that 
Fig. 5. Actual nitrogen contained in 1,000 grains. 
is much accentuated towards the end. The trend of this increase can best 
be shown by calculations made at nine-day intervals. 
TABLE I. 
Per cent, of nitrogen in dry matter 
Actual increase in 
entering the grain. 
dry matter . 
Nine-day intervals. 
Plot A. 
Plot A. 
July 13-22 
1.424 
12.660 
July 22-31 
I, 37 I 
1 2-984 
July 31-Aug. 9 
2.088 
10-877 
Aug. 9-18 
3.828 
4.702 
Plot B. 
Plot B . 
July 16-25 
1-119 
12-639 
July 2 5- Aug. 3 
1.038 
10-828 
Aug. 3-12 
1-75° 
10-824 
Aug. 12-21 
3*946 
3-540 
Plot C . 
Plot C. 
July 22-31 
1-222 
n-797 
July 31-Aug. 9 
I.298 
13.808 
Aug. 9-18 
1-756 
10.015 
Aug. 18-27 
? 
— 
Aug. 27-Sept. 5 
3*318 
2-339 
