Tue CarsBon DioxIDE OF THE Sort AIR 341 
Fie. 55. MILLET CROPS SEVEN AND ONE-HALF WEEKS AFTER SEEDING, ON THE TWO SOILS 
HAVING HIGH AND LOW INITIAL CONTENTS OF CARBON DIOXIDE, RESPECTIVELY 
Same as figure 54, but showing cylinders 
before and a few weeks after the heading period plotted to the left and 
to the right of this point, respectively. | 
Since the experiment was discontinued before the millet crops matured, 
it is not possible to say whether or not the curve for the later period of 
