THE BROAD-SCLEROPHYLL VEGETATION OF CALIFORNIA. 61 



selected, representing the Adenostojna, Arctostaphylos, and forest 

 habitats, and rain-correcting atmometers were substituted for the 

 ordinary kind. The surface instruments were surrounded with 

 chicken wire, which proved an adequate defense. Readings were 

 taken weekly until the close of the soil-moisture observations on 

 January 16, 1914, and at intervals of approximately four weeks 



AVERAGE DAILY EVAPORATION IN CUBIC CENTIMETERS 



Dry season Wet season 



131 days, June 8 to October 17, 1913 114- days, November 10, 



' 1913 to March 4-, 1914 



Sta.l. 5outh slope 

 Adenostoma 30.4 



Sta. 2. Summit 

 Adenostoma 



Sta. 3. North slope 

 Arctostaphylos 



Sta.4. South slope 

 Adenostoma 



Sta 5 South slope 

 Adenostoma 



Sta 6. North slope 

 Arcrostapriylos 



Sta 7. North slope 

 Forest 



Sta. 8. North slope 

 Forest 25.3 



Sta.9. South slope 

 Adenostoma 27.7 



Summary, dry season 

 All Adenostoma 



All Arctostaphylos 



28.2 



Fig. 15. — Average daily evaporation in cubic centimeters in 

 stations 1 to 9 at Jasper Ridge, for the dry season 

 of 1913 and the succeeding wet season; also the 

 maximum daily rate (week ending Sept. 19). 



thereafter until April 17, when the series was closed. We thus 

 have records of one complete dry season, following a winter of 

 deficient rainfall, and of one complete wet season — an unusually 

 rainy one — fair samples of extremes in both directions. The dry- 

 season series is complete for nine stations at the upper level and 

 incomplete for the lower; the wet-season series is practically com- 

 plete for the representative stations at both levels. 



The results have been summarized in three figures. In figure 14 

 the upper-level series is used, and the water-losses for three rep- 



