Brenchley . — The Development of the Grain of Barley. 913 
Relation of Migration Processes to the Nutrition of the Whole Plant. 
The straw belonging to each of the marked ears collected was cut off close 
to the ground, and a series of analyses made parallel to those of the grain. 
parts 
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ll 15 18 l\ 24- 27 30 33 36 39 4-2 45 4-8 days. 
Fig. 14. Maltose produced per 100 parts of dry matter. 
Straw. 
C 
A 
B Grain.. 
0 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 Days. 
Fig. 15. Curve showing the progressive ratios between the dry weights of the straw and grain. 
(Weight of straw at each period is taken as a constant, 100.) 
Calculations were made to determine the dry weight of the straw associated 
with 1,000 grains at each period. The progressive ratios between the straw 
and grain are shown in Fig. 15, in which a constant figure, 100, is adopted for 
3 P 
