EVERGREEN TREES IN WINTER. 327 



came about 3-6 times greater tlian at the end of January ; thus 

 the average values of daily transpiration during January 17th- 

 24th and March 21st-23rd (see Tables III and VIII) were :— 



Daily transpiration jier D'!'"- in gr- 

 End of January. End of Marcli. 



Quercus glauca 0,9öl 6.063 



Pittosporum Tohira 0.506 2.012 



lUicium Anisatum 0.462 1.974 



Ternstrœm la japon ica 0. 32 8 1 . 802 



Thea Jajmnca 0.331 0.934 



Eribotrya japonica 0.476 2.006 



Photinia glabra 0.395 1.140 



Fatsia japonica 0.495 2.464 



Dapjhniphyllum macrop)odum 0.434 1.251 



As shown in the foregoing table, the minimum average value 

 of transpiration lies between 0.328 (i.e. Ternstrœmia) and 0.50G 

 gram (i.e. PiUosporum) per D dm. a day in the above nine species, 

 with the single exception of Quercus (0.901). Of all the eight 

 tables (Table I-VIII) we see that Quercus represents the maximum 

 in the amount of transpiration, while Ternstrœmia shows, for the 

 most part, the minimum. Other plants behaved themselves dif- 

 ferently during different periods of the experiments. For the sake 

 of comparison, therefore, I summed up the whole amount of trans- 

 piration in each case, from the beginning to the end of the 

 experiments^, and then reduced this to the unit area of leaves, as 

 represented in the following table : — 



Names of Plants. . "^^^^^ amount of Trans- Reduced to tJie unit 



piration durin^; experiments. area of leaves O^'u. 



Quercus 345.0 gr. 62.1 gr. 



Pittosporum 402.5 „ 32.9,, 



llUcium 413.0 „ 27.5,, 



