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Contents. 



I. Introductory. 

 II. Metliod. 



III. ïlie Climate of Micldle Japan. 



IV. Evergreen Trees of Japan. 



V. Transpiration under Direct Insolation. 

 VI. Transpiration under Diffused Light. 

 VII. Summary. 



Experimental Data. 



I. Transpiration by Direct Insolation of Pot-Plants. 

 II. Transpiration of Cut-Branches in Diffused Light. 

 III. Mode of the Absorption of Water by Cut-Branches at Low Tem]i.crature. 



