TRANSPIRATION STUDIES. 



27 



but lost its leaves immediately and gained a new set after two weeks. The 

 areas were as follows: No. 1, 68. .31 sq. cm.; No. 2, 75.70 sq. cm.; No. 3, 

 101.67 sq. cm.; No. 4, 13.11 sq. cm. No. 1 had acquired a new set of leaves 

 since April 25, when they were taken off for measurement. 



Table 9. Trans-piration of four ])oUed plants. Experiment IX. Dale, June 30, 1911. 



.022 

 .021 

 .020 

 .019 

 .018 

 .017 

 .016 

 .013 

 .OU 

 .013 



.012 

 Oil 

 .010 

 .009 

 .008 

 .(K)7 

 .006 

 005 

 004 

 ,003 

 ,002 

 ,001 



-^-^ 



; I 

 : I 



I 



I 



-^- 



I 



I 



I 



!i ! 



// / 



/ 



./-^-K 





// ./ ! 

 // / ./ 



\ / 



/ '/ 



^^i=i-i 



No. 1 



No. 2 



No, 3 



No. 4 



8 9 10 11 12 1 



Fig. 



13. Graphs for actual transpiration of four potted 

 plants. Exp. IX. 



