1914] 



OTIS— TRANSPIRATION OF WATER PLANTS 



479 



marked 



conspicuous during the day. On a basis of surface exposed, the 



35C 



325 



300 



m275 

 S.250 



o 



225 



§200 



g 175 

 a 



d 



£150 



;i25 



c 100 



r 75 



50 



25 



1-4 



3 



« 



CHART IV. 



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i 



i 



L-L. 





=^ 



Typha lati folia 



Free Water Surface 



T3 <D cri-rlL 



t3 



! pom ^;cq >H*-J >»-i| oo 



LI 



"2 fa 



1* 



T3 T3 



8 9 10 11 12 13 



MO -^ 

 Oct)-— « O m07 



- U 



91 



M >i+*r-* M 





o*j 





*. 



EC 



: 



•c!* 3 ^ 



- 



- 



c 





• »-. O tt>- Oi 



2S i I L- 



^,- at 



14 15 



A U 



16 17X 19 

 GUST 



20 21 



1 S 



22 X 24 

 1 . 



25 26 27 28 29 30 



arrow-head would seem to be the least effective from the standpoint 

 of water dispersal, the rushes and water lily showing greatest 

 efficiency, with the pickerel- w r eed and cat-tail occupying an inter- 



