270 
ANALYSIS  OF  CHURCH-HILL  ALUM  WATER. 
Analysis. 
Grains  in  the  gallon. 
In  10,000  parts. 
Jrotassa,                  .  • 
l.oZO  • 
u.zzo/ 
oocia, 
o.oUl 
U.OOOD 
Ammonia,      .  . 
n  1Q9 
U.U0Z0 
Lime,  .... 
oD.OoU  • 
O.ZOOo 
Magnesia, 
f)Q  dQQ 
zo.boo 
4.9147 
Alumina, 
zl.o7l) 
d.7400 
Protoxide  of  iron, 
11.838 
.  2.0280 
Peroxide  of  iron, 
62.186 
.  10.6533 
Sulphuric  acid, 
OA  Q  Q£A 
Z'lo.you 
A  O  RA  QQ 
Chlorine, 
'  2.808 
.  0.4810 
Silica,  . 
10.429 
.  1.7867 
Phosphoric  acid, 
trace 
trace. 
'  Total, 
428.165 
73.3^09 
Found  by  direct  weight, 
432.108  .• 
.  74.0267 
The  difference  between  the  sum  of  the  separate  ingredients  and 
the  total  amount  of  solid  residue  in  the  water  is  less  than  one  per 
cent.  The  above  ingredients  are  grouped  together  as  salts,  ac- 
cording to  their  respective  affinities,  in  the  following  table,  repre- 
senting the  rational  analysis.  The  sulphuric  acid  belonging  to  the 
respective  bases  is  placed  opposite  to  them. 
Rational  Analysis. 
Grains  in  the  gallon. 
Salts. 
Sulphuric  Acid 
Sulphate  of  potassa, 
2.444 
1.121 
Sulphate  of  soda 
1.943 
1.094 
Chloride  of  sodium, 
4.627 
Sulphate  of  ammonia, 
0.643 
0.451 
Sulphate  of  lime, 
88.836 
52.257 
Sulphate  of  magnesia, 
86.064 
57.376 
Sulphate  of  alumina,  (neutral,) 
72.928     .  . 
51.058 
Protosulphate  of  iron, 
24.991 
13.153 
Persulphate  of  iron,  (neutral,) 
51.270 
30.762 
Persulphate  of  iron,  basic,) 
83.355 
41.678 
Silica,  ..... 
10.429  < 
Phosphoric  acid, 
trace 
427.530 
248.950 
