378 
McLean . — Field Studies of the Carbon 
Diagram 4, Amounts of carbon dioxide absorbed per square metre each two hours by two pinnae 
of coco-nut (lower graph) and spread of edges of pinnae (upper graph) on May 25, 1918. ” 
Diagram 5. Amounts of carbon dioxide absorbed per square metre each two hourg by two pinnae 
of coco-nut (lower graph) and spread of edges of pinnae (upper graph) on May 28, 1918. 
