220 



BOTANICAL GAZETTE 



[APRIL 



40"^ above sea-level Both this station and the standard were bare of 

 vegetation at the time these comparative readings were made. 



Amt. evaporation, Station 2 . . . . 

 Amt. evaporation, standard. . . . 



June 5-10 



June 10-19 



June jg-24 



90-3^" 



145-5^'= 



100.3'^^ 



102.2 



207.3 



112. 6 



Total (19 days) 



cc 



336-1 

 422.1 



poration 



3% 



% 



Wc 



6% 



This result indicates that for this nineteen-day period the increased 

 elevation is correlated with decreased evaporation. This was quite 

 unexpected, but on account of the small number of instruments at 



^^^- 3- View from Station i across the Carnegie garden and salt marsh. 



instrument 



my disposal could not be tested further. The ....... ^. 



subsequently tested and found to be perfectly standardized, so that 

 there is no question about the correctness of this series of readings. 



Station j. 

 o.25'"« from the standard. 



Slopes eastwj 

 northern two 



;ar St. John's Episco 

 The soil is a coarse 



altitude of station 25 



half 



grav 



gravel ; 



The 

 sturbed 



)r some 



the slope. There were none of these near the instrument. The south- 

 ern third of the slide had been invaded by plaits and had become 



