87 



The following tables give the history of several leaf and flower stalks 

 whose developement was observed in the way explained. In the same 

 tables I have noted down the growth of leaf and flower for comparison. 

 The length of leaf stalk given here is that above the water-level, as 

 marked on the stalk at the time of first measurement, the part under 

 water being perhaps 50-70 c.m. In all the tables lengths are given in 

 centimeters and temperatures in centigrade degrees. 



Tab. I. 



LEAF-STALK— I. 

 The part under water = 58 c. m. 



Date. 



Time. 



Length 

 of Leaf- 

 stalk. 



Daily 

 Growth. 



Leaf.D 



Daily 



Growth. 



Mean 2 > 

 Temp. 



Remarks. 



Aug. 12 



12. m. 



30.0 





17.0 





26.5 





13 



3. p.m. 



53.0 



SS.O 



23.0 



6.0 



26.8 





14 



1.30 „ 



73.5 



20.5 



28.5 



5.5 



24.6 





15 

 16 



1.30 „ 

 1.15 „ 



88.0 

 96.0 



14.5 



8.0 



34.5 



42.0 



6.0 

 7.5 



26.2 



27.1 



Leaf begins to 

 unfold 

 Half unfolded. 



17 



1.50 „ 



101.5 



5.5 



48.5 



6.5 



28.6 



Almost unfolded. 



18 



12. m. 



104.0 



2.5 



53.0 



4.5 



27.6 



Fully unfolded. 



19 





106.0 



2.0 ' 



54.0 



1.0 



27.9 





20 





107.7 



1.7 



54.5 



0.5 



27.5 





21 





109.5 



1.8 



54.8 



0.3 



27.3 





22 





110.5 



1.0 







26.2 





23 





111.3 



0.8 







25.1 





24 





112.0 



0.7 







24.0 





25 





112.5 



0.5 







25.6 





1) The data noted under this head are the lengths of the young folded leaf and the 

 diameters of the developed one. 



2) The temperature given in this and the following tables were taken from the observations 

 made at the Central Meteological Observatory of Tokyo, which is about one and a half miles 

 distant from the Botanical Garden. I found that there is very little difference in temperature 

 between the two localities, by comparing the results of observations made in both places. 



