Fig. 2. Topography of ocean bottom, and approximate number and distri- 

 bution of observations. 



Since the "sections" chosen for the ocean are too large to reveal adequately 

 the distribution of observations made in San Diego and False (Mission) bays, 

 these bays are left blank, although approximately four hundred hydrographic 

 observations were made in the former and forty in the latter. 



[284] 



