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. 



9 



10 11 



12 



Fig. 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 \B). 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, 



