98 DEPOSITS OF PHOSPHATE OF LIME. [bull. 46. 
[II. Phosphate from the Upper Greensand. at Dippen Hall (Way). J 
Insoluble siliceous matter 9. 84 
Soluble silica 2.36 
Phosphoric acid 27.60 
Equal to bone earth phosphate, 59.60. 
Carbonic acid 6. 96 
Lime 44. 56 
Magnesia and loss 0.81 
Oxide of iron and alumina 4. 61 
Organic matter 3.26 
100. 00 
[III. Fossil sponge, a branching Alcyonite from the Upper Greensand ("Way).] 
Insoluble siliceous matter and soluble silica 7.68 
Phosphoric acid 29. 87 
Equal to bone earth phosphate, 61.30. 
Carbonic acid 8.77 
Lime 42.29 
Oxide of iron and alumina 6. 87 
Water, organic matter, fluorine and loss 4 . 52 
100. 00 
[IV. Ked nodule from the Upper Greensand, at Dippen Hall (Way).] 
Insoluble siliceous matter, with a little clay 7. 18 
Soluble silica 3.28 
Organic matter 2. 49 
Phosphoric acid 27. 13 
Equal to bone earth phosphate, 55.96. 
Carbonic acid 8. 77 
Lime 39.85 
Magnesia 0. 96 
Oxide of iron and alumina 10. 60 
Fluorine »„ Trace 
100. 26 
[V. Phosphatic nodules from the Upper Greensand (Volcker).] 
Moisture and organic matter 4.68 
Lime 43.21 
Magnesia 1. 12 
Oxide of iron 2. 46 
Alumina 1.36 
Phosphoric acid 25.29 
Carbonic acid 6. 66 
Sulphuric acid 0. 76 
Chloride of sodium 0.09 
Potash 0.32 
Soda 0.50 
Insoluble siliceous matter 8. 64 
Fluoride and loss 4.96 
100. 05 
(572) 
