162° 



160° 



158 



Figure 36, --Surface phosphate-phosphorus distribution in 

 Hg-at/1, H. M. Smith cruise 21, August 1953. Contour 

 interval 0. 1 |jig-at/l. 



24° 



Figure 37. --Phosphate-phosphorus distribution (fig-at/l) on the 

 24.5 sigma-t surface, H, M. Smith cruise 21, August 1953. 

 Contour interval 0. 1 p.g-at/1. 



60 



