On Changes in the Sea and Their Relation to Organisms. 



219 



,-FvT Mld ?S^/t^&f Ust *V 



1 



l\ -o '"^ "*. /< " V 



FIG. 4. Positions of stations A to N at Tortugas, Florida. The numbers opposite the letters 

 A to N denote the cubic centimeters O^ per liter in the afternoon. 



Table 1 gives the total CC>2 for alkaline reserve =25. 



TABLE 1. 



The CO 2 of the air was determined colorimetrically (McClendon, 

 1917), 30 observations showing it to vary from 2.8 to 3.5 parts per 



