DR. WOLLASTON ON THE WATER OF THE MEDITERRANEAN. 31 
water by a certain factor, which will vary with the temperature that we may 
select for drying. 
At 212° this factor is about .144, and the product will then represent the 
saline contents + a quantity of water retained by the deliquescent salts. At 
300°, and upwards, the factor is only .134, on account of a nearer approach 
to perfect desiccation. 
But as the leading question considered in this paper does not turn upon 
the estimate or actual weighing of any small differences in quantity, I have 
not thought it necessary to spend much time in endeavouring to obtain as 
precise a determination as resulted from the more careful manipulation of 
Dr. Marcet himself. 
Table. 
Latitude. 
Longitude. 
Depth. 
Sp. Gravity. 
Salt per Cent. 
No. 1 
2 
3 
38 30 
37 30 
36 0 
4 30 E. 
1 0 E. 
4 40 W. 
450 fath. 
400 
670 
1.0294 
1.0295 
1.1288 
4.05 
3.99 
17.3 
Gibraltar 
36 7 
5 22 W. 
