20 Analysis of Sea Water. 
When these analyses are compared, it will be found that the 
Channel water contains 9 times as much lime as the Mediterra- 
nean, but this can be accounted for, as the water flows over a bed 
of chalk. The Mediterranean again has twice as much magnesia 
and sulphuric aci 
~ We also find that the English Channel contains in 1000 grains 
water, 35°25628 grains of anhydrous ingredients; which amount 
corresponds very nearly to 35 grains, or 35-1 grains, obtained from 
several experiments, when 1000 grains were evaporated in a pla- } 
tina crucible, mixed with a little chloride of ammonium, to pre- : 
TI eee 
* 
vent as much as possible the decomposition of the earthly chlo-~ 
rides, and the residue carefully ignited, in order to volatilize the 
chloride of ammonium, where, however, a dissipation of hydro- 
chloric acid had taken saints ' | 
te Sometimes I found faint traces of oxide of iron, when the con- 
- eentrated water was mixed with sulphocyanuret of potassium, 
3 ar sularly after boisterous weather ; I found the same in respect | 
‘to organic matter. The sea-water taken on a fair and calm day, 
: 
j 
when very transparent, did not yield the slightest indication of — 
_ extractive matter when evaporated and ignited. A small quan- 2 
tity of free carbonic acid gas has been likewise found; and also” 
extremely minute traces of chloride of ammonium were detected, 
when about 5 pounds of sea-water were evaporated ina water- cae 
bath. to nearly half. an ounce, which, mixed with caustic soda >. 
e toa ee rod wetted — mph Cy,4 
acid. — or eee ee a ee gees a 
$. 
ve 
e sea-water: t . 
Jane, from the surface, six mil e bh 
. The weather was fair, the sea calm a and extremely transparent. 7 
*. specific” weight ‘was at 60° Fahr. 1-0274. Another portion be 
~ tained by a proper apparatus from the very bottom of the sea, 10 i 
" . fathoms deep, was of the same specific gravity, and likewise that 
taken almost close to the shore. In the month of July, after @ © 
> as rainy day, the sea-water taken four miles from t the shore, — 
< Fahr. paiecisc gravity of 10274; ata distance of 2 2 
“2a ; and close to the shore, 1-0268. It was exami 
. = 3 t, the weather being fair and warm, wits 
* or . - 
