4 
OF SEA-WATER. 221 
indicated, was not to be completely looked for by solution and 
_ crystallization. Sub-carbonate of soda was therefore added to 
. the solution as long as any precipitation took place ; the preci- 
_ pitate heated with a sufficient proportion of sulphuric acid to 
redness, gave 16.4 sulphate of magnesia, equivalent to 33.7 of 
the same salt crystallised. The former quantity abstracted: 
from the weight of the muriate of soda, reduces it to 736 
grains. 
This analysis, then, affords the following ingredients, and: 
their proportions in their real state.. 
Muriate of Soda, - 736 grains. 
Muriate of Magnesia, - 85.8 
Sulphate of Magnesia, = - 51.2. 
Sulphate of Soda, - 8 
Sulphate of Lime, - 29.3. 
Or, reducing them to a pint of the water, 
- Muriate of Soda, - 184 grains. 
Muriate of Magnesia, — - 21.5 
cnt | Sulphate of Magnesia, - 12.8 
Sulphate of Soda, - 2 
Sulphate of Lime,. - 71.3 
2277.6. 
pe ' | 
_ By the two modes of analysis now stated, different results 
‘have been obtained. There are common to both as the prin- 
cipal products, Muriate of Soda, and Muriate of Magnesia. 
But in the one, sulphate of magnesia, with only a small: pro- 
portion of sulphate of soda, are procured. In the other, sul- 
by phate 
