1844.] On the Specific Gravity of Sea Water. J 69 



Specific gravity of Sea Water from 47° 28' N. Latitude to 18° 1 1' S. Latitude. 



Date. 



Temp. 



S P . gr. | 



Reduced, j 

 Sp. gr. 



Latitude N. 



o ' 



47 28 



Longitude W. 



Sept. 16 



65.8 



1026.2 



1027.290 



o ' 

 7 26 



17 



66.5 



1026.3 



1027.522 



46 42 



8 3 



IS 



68.3 



1025.6 



1027.160 



44 53 



8 ]6 



19 



66.0 



1026.2 



1027.328 



44 6 



8 57 



20 



65.9 



1026.0 



1027.109 







22 



69.9 



1026.3 



1028.161 



38 46 



14 21 



23 



71.8 



1026.3 



1028.578 



36 29 



16 16 



24 



73.7 



1026.4 



1028.976 



30 42 



17 32 



25 



73.8 



1026.4 



1028.994 



31 12 



18 15 



26 



74.6 



1026.3 



1029.045 



28 36 



19 17 



27 



75.5 



1026.5 



1029.414 



25 19 



20 50 



28 



77.7 



1026.1 



1029.428 



2152 



22 50 



29 



79.0 



1025.9 



1029.472 



18 46 



24 59 



30 



81.2 



1025.2 



1029.186 



15 33 



25 51 



Oct. 1 



82.1 



1024.6 



1028.810 



12 23 



24 00 



2 



84.0 



1024.2 



1028.712 



11 4 



23 13 



3 



83.6 



1024.4 



1028.837 



10 29 



23 00 



4 



84.0 



1024.2 



1028.712 



9 3 



22 21 



5 



84.0 



1024.2 



1028.712 



8 17 



22 00 



6 



84.5 



1024.1 



1028.706 



7 39 



20 57 



7 



84.4 



1023.9 



1028.487 



6 59 



20 28 



8 



84.4 



1023.9 



1028.487 



6 8 



20 2 



9 



81.8 



1024.4 



1028.498 



4 48 



18 51 



10 



81.5 



1024.5 



1028.542 



3 42 



17 5 



11 



81.5 



1024.5 



1028.542 



3 42 



17 5 



12 



80.1 



1024.6 



1028.379 



311 



17 1 



13 



80.1 



1024.6 



1028.379 



2 37 



17 21 



14 



79.0 



1025.2 



1028.772 



156 



16 37 



15 



79.0 



1025.2 



1028-772 



47 



18 34 



16 



78.8 



1025.4 



1028.934 



51 S. 



20 31 



17 



78.6 



1025.5 



1028.997 



3 2 



23 6 



18 



78.6 



1025.5 



1028.997 



5 44 



24 51 



19 



77.8 



1025.7 



1029.046 



9 4 



26 23 



20 



77.1 



1026.0 



1029.215 



13 6 



27 18 



21 



76.7 



1026.4 



1029.540 



16 



27 15 



22 



76.5 



1026.5 



1029.602 



18 11 



27 3 



The above table requires but little comment ; the less perhaps as 

 some doubt attaches to the perfect accuracy of specific gravities reduced 

 for the same temperature, in which condition only do they admit of just 

 comparison. It is however obvious, that the gravity of sea water in- 

 creases, as might be anticipated, with the distance from the land ; and 

 that that, increase continues in the present case up to 18° 36' North 

 latitude, when a decrease again takes place till near the equator. It 

 then begins to rise with increase of Southing until at the point where 



