PHYSICAL OOEANOGKAPHY OF THE GULF OF MAINE 



977 



for the densities will average less than ±0.04 units when the salinity has been deter 

 mined by titration. In the case of hydrometer readings, the probable error of the 

 densities will be about ±0.1 unit. 



All depths, whether originally recorded in meters or fathoms, are given in meters 

 in these tables. Tables 1, 2, and 3 show the compression of sea water as condensed 

 from Ekman's (1910) tables 2, 4, and 5. '' 



Table 1. — Correction of density for depth — water 0° and 28 in density (sp. gr. 1.028) 



Table 2. — Additional corrections for compression at other temperatures 



Table 3. — Additional corrections for compression at other densities 



8B Condensation of the tables entails employing an average relationship between meters and decibars. Consequently, they 

 are accurate only to ±2 in the last decimal place. This, however, falls within the accuracy of observation and will suffice for the 

 construction of ail ordinary projections of density in water so shoal. 



