Penrose.] PHOSPHATES OF ENGLAND. 99 
[VI. Upper Greensand from Dippen Hall (Way).l 
Coarse Fine 
part. part. 
Insoluble siliceous matter 21.85 26.25 
Soluble silica 20. 18 18. 11 
Orgauic matter 6. 25 5. 95 
Phosphoric acid 780 10.38 
Carbonic acid 10.91 10. 34 
Lime 20.58 19.87 
Magnesia 1.59 q.87 
Oxide of iron and alumina 8.18 6.18 
Potash and soda, not estimated 
97. 34 97. 95 
[VII. Upper Greensand from Dippen Hall ("Way).] 
Coarse Fine 
part. part. 
Insoluble siliceous matter 26.83 32.81 
Soluble silica 26.30 29.14 
Organic matter 2.64 3.02 
Phosphoric acid(l) 9.31 6.61 
Carbonic acid 2.35 2.30 
Lime 15.24 9.53 
Magnesia 1.43 1.97 
Oxide of iron and alumina 13. 11 11. 46 
Potash Not est. 3.10 
Soda Not est. 0.00 
99.94 
(1) Equal to bone earth phosphate 19.22 
(1) Equivalent of earthy bone 13,63 
[VIII. Cambridgeshire glauconite (Professor Liveing).l 
Water 10.80 
Silica - 51.09 
Alumina 9.00 
Iron (protoxide) 19.54 
Magnesia 3. 37 
Lime 0.30 
Soda - 3.56 
Potash . 2.47 
100. 13 
[IX. Phosphate nodules from Lower Greensand (Way).] 
Insoluble siliceous matter 43. 87 
Soluble silica 3.25 
Organic matter, water, and fluorine 3. 44 
Phosphoric acid 20. 80 
Equal to bone earth phosphate, 42.48. 
Carbonate of lime 1-06 
Lime in combination with phosphoric acid 23. 86 
Oxide of iron and alumina 3. 35 
Magnesia and loss 0. 37 
100. 00 
(573) 
