462  ANALYSIS  OF  HIGHLAND  "  CUTWEED "  KELP. 
lime,  but  the  precipitate  obtained  by  the  addition  of  ammonia 
contained  a  considerable  quantity  of  magnesia,  as  well  as  alumina 
and  oxide  of  iron.  The  iodine  was  estimated  by  the  process  de- 
scribed in  the  «  Chemical  Gazette  "  for  the  present  year,  p. 
137;  the  mean  of  three  determinations  was  taken.  The  silicate 
of  lime  was  calculated  according  to  the  formula  2  CaO,  SiO3. 
The  general  analysis  gave  as  follows  : — 
Soluble  salts 
60-9 
Insoluble  " 
36-1 
Moisture  . 
3-0 
1  AA 
KJOLllULi/  AJCttCO. 
Sulphate  of  potash  . 
Chloride  of  potassium  . 
19-86 
Chloride  oi  sodium  .  . 
d-47 
Iodide  of  sodium  .    .  . 
OA 
•20 
Sulphide  of  sodium  .  . 
O  AO 
2-92 
Hyposulphite  of  soda  . 
1-98 
bulphite  oi  soda  .    .  . 
2-71 
Sulphate  of  soda  .    .  . 
15-10 
Phosphate  of  soda    .  . 
A  £T 
•95 
Carbonate  of  soda    .  . 
5-15 
•82—60-9 
Insoluble  Salts. 
Sulphide  of  calcium  .  . 
2-09 
Phosphate  of  lime    .  . 
6-44 
Carbonate  of  lime    .  . 
11-17 
5-70 
.23 
Oxide  of  iron  .    .    .  . 
1-42 
Silicate  of  lime    .    .  . 
2-77 
1-65 
Carbonaceous  matter 
3-30 
1.33—36. 
3-00 
100 
