80 



I. NAGAI : 



couragement, suggestion, and facilities given liim for caiTving out certain 

 pliTsiological experiments. Without tbeiu, the study %\ould not have been 

 able to reach the present state. His sincere thanks are also due to the 

 Authority of the Imperial Agiicultm-al Espsriment Station who has given him 

 permission to take oppoituuities of conducting this investigation. To Messers. 

 T. NiBE, Y. Kakizaki, T. Tajiba and J. Tsukamoto and other colleagues and 

 hiends who have heli:)efl the writer in various ways, his cordial thanks are 

 extended. 



Table 31. 



Showing the result obt.iined in F^ of the cross 

 " P.iildcoto " X " Togo." 



