26 



TRANSPIRATION IN A DESERT PERENNIAL. 



EXPERIMENT VIII. 



Subject, plant No. 1 ; area, 52.95 sq. cm. Atmometer No. 812, equivalent 

 to 143 sq. cm. of free water-surface. Situation, in the shade in a well- 

 lighted room of the laboratory. 



TABLE 8. Transpiration of potted plant No. 1, in the shade. Experiment VIII. 



T E 



008 

 007 

 006 

 006 



004 



603 



75 

 .70 

 .65 

 .60 

 .55 

 .50 

 .45 

 .40 

 .35 

 .30 

 .25 

 .20 



15 



002 . 10 

 001-.01-.05- 



10 11 



Fia. 12. Graph for shade transpiration of potted plant No. 1. Exp. VIII. 



EXPERIMENT IX. 



Subject, four potted plants, Nos. 1, 2, 3, and 4 (see plate IB). Plants 

 Nos. 2 and 3 had the same history as No. 1, while No. 4 was the only survival 

 of some 30 which had been taken from their natural position in the soil and 

 placed in pots several weeks before. No. 4 was a seedling which had germi- 

 nated in the spring of 1910. It was in full leaf at the time of transplanting, 



