498 
LOWER OOLITIC ROCKS OF ENGLAND : 
ANALYSES, &c. continued. 

A. 
B. 
C. 
D. E. 
Protoxide of manganese - 
Alumina - 
0-51 
7-13 
l-ll 
4-62 
0'69 
12-35 
J 8 ' 56 
f 0-16 
\ 8-08 
Lime - - 
7-13 
0-50 
trace. 
0-56 
3-47 
Magnesia 
Carbonic acid 
0-57 
4-92 
7-96 
24-79 
4-13 
0-16 
0-50 
0-66 
2-67* 
22-32 
Phosphoric acid - 
Sulphuric acid 
Soluble silica 
1-26 
1-60 
0-22 
trace. 
1-99 
0-26 
trace. 
1-96 
2-24 
0-03 
1-99 
trace. 
Insoluble residue (silica, &c.) 
Water - 
Organic matter - 
13-55 
11-37 
24-09 
0-54 
0-08 
24-61 
6-92 
0-19 
13-10 
ll5-74 
9-04 
("4-92 
100-27 
99-32 
99-98 
99-12 
99-72 
Metallic iron 
37-00 
28-28 34'83 
40-20 

A. Wellingborough Iron-ore. Analysis by Mr. John Spiller. 
B. Northamptonshire Iron-ore. Inner unweathered portion. Analysis by 
Mr. Allan B. Dick. 
C. Northamptonshire Iron-ore. Outer weathered portion. Analysis by Mr. Dick. 
D. Cottesmore Iron-ore. Analysis published by Mr. J. D. Kendall. The 
average yield of iron is 32 or 33 per cent. 
E. Northamptonshire Iron-ore. Green patches in rock. Analysis by David Forbes. 
An analysis of ore from Hardingstone, was also made by Mr. Dick. 
Miscellaneous Iron-ores. 
I have elsewhere referred (p. 60) to the occurrence of 
ferruginous beds in the Inferior Oolite of Dorsetshire. They 
occur in the lower portion or " iron-shot beds." An analysis of 
brown rock from Symondsbury, near Bridport, has kindly been 
made by Mr. Dick, with the following result : 
Peroxide of iron - - - - - 35 '00 
Protoxide of manganese 
Lime 
Magnesia 
Silica 
Alumina 
Potash 
Soda 
Carbonic acid 
Sulphuric acid 
Phosphoric acid 
Water (combined) 
Trace. 
- 19-00 
1-44 
- 10-60 
9-50 
-1 Notde- 
- J termined. 
. 18-70 
Trace. 
Trace. 
4-00 
98'24 
* Includes Potash, 0-19, and Soda, 0-27. 
