of sea waters , in different parts of the ocean , &c. 201 
Baffin’s Bay, from the depth of 80 fathoms, latitude 36°, 32', 
longitude 76°, 46' west. When this had been reduced to about 
J^th part, I drained the liquor from the salt that had formed, 
which I also washed with a little water, and by adding mu- 
riate of platina to the drained liquors, I had a yellow precipi- 
tate which weighed 12,4 grains. 
As the fluid poured from this precipitate measured |of a 
fluid ounce, I estimate that this would retain in solution about 
three grains of the triple muriate, and hence the whole amount 
must be taken at 15,4, which by former experiments I consi- 
der as equivalent to about 6,4 sulphate of potash, * or 3,5 
potash. 
Now, since the pint of water weighed about 7520 grains, 
/a‘ ro g* ves the proportion of potash about ~ ; but the 
quantity of mere potash is less than -^ - g th part of sea wa- 
ter at its average density.” 
* Dr. Wollaston thinks it probable that the potash exists in sea water in the 
state of sulphate. 
MDCCCXIX. 
D d 
