On Changes in the Sea and Their Relation to Organisms. 



219 



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

 A to N denote the cubic centimeters O2 per liter in the afternoon. 



Table 1 gives the total CO2 for alkaline reserve = 25. 



Table 1. 



The CO2 of the air was determined colorimetrically (McClendon, 

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



