40 



Papers from the Department of Marine Biology. 



conversion table was made by Fox. For those who may be confused 

 at first by logarithmic paper the relation of P H and C0 2 tension is 

 shown on ordinary coordinate paper in figure 11. 



2 3 4 56789 10 



CO, pressure in 0.0001 atmospheres 



FIG. 8. Conversion table for finding the CC>2 ten- 

 sion of sea-water of 24 excess base from the 

 temperature and total CO2- 



54 

 53 

 52 

 51 



3 50 

 I 49 

 848 



"rt 



= 47 



<_> 

 u 46 



45 

 14 



43 

 42 



10 

 20 



30 s 



1 2 3 456789 10 



C0 2 pressure in 0.0001 atmospheres 



Fio. 9. Conversion table for finding the COj ten- 

 sion of sea-water of 25 excess base from the 

 temperature and total COj. 



Excess base over strong acid 



Fia. 10. Data to be used in making a conversion 

 table like fig. 9, but of any other excess base. 

 Transfer values from fig. 9 to the 25 ordinate 

 and draw diagonals through them parallel to 

 the nearest diagonal in fig. 1 1 ; the values 

 sought are found where these diagonals cut 

 the ordinate of the excess base sought. 



