100 DEPOSITS OF PHOSPHATE OF LIME. [bull. 46. 
[X. Phosphatic nodule from Lower Greensand (Way).] 
Silica and sand 13. 64 
Sulphate of lime 50. 16 
Water in combination 14. 97 
Water (accidental) 7.47 
Phosphoric acid 4.80 
Lime, additional 0. 27 
Oxide of iron and alumina 8.82 
100. 13 
From the above analysis it will be seen that most of the phosphoric 
acid must have been in combination with iron and alumina. 
[XI. Large green grains from a Lower Greensand phosphatic conglomerate (Way).] 
Soluble and insoluble siliceous matter 18.53 
Water 2.28 
Phosphoric acid 20. 65 
Carbonic acid 4. 01 
Sulphuric acid 5. 13 
Lime - 34. 61 
Oxide of iron 7.24 
Alumina 0. 98 
Potash .„ 1.79 
Soda 1.87 
97,09 
{XII. Lower Greensand nodules (Volcker).] 
Average samples 
of siftings from Washed rock 
layers at 1 and from another 
2 feet. place. 
Water of combination 5. 17 5. 67 
Phosphoric acid 122.39 2 15. 12 
Lime 32.73 26.69 
Magnesia, alumina, and fluorine (by difference) 6. 64 4. 51 
Carbonic acid 3.06 2 2. 18 
Oxideof iron 18.08 20.61 
Siliceous matter 21. 93 25. 22 
100. 00 100, 00 
[XIII. Partial analysis of phosphatic conglomerate, Lower Greensand, from Folkstone, by Way]. 
Insoluble siliceous matter t 30. 60 
Phosphoric acid 7. 23 
Potash 3.31 
Soda 1,02 
[XIV. Lower Greensand mass, from which the principal fossils and nodules were picked, by Way.] 
Insoluble siliceous matter 75. 46 
Soluble silica 8. 12 
Organic matter 2. 30 
Phosphoric acid 0. 64 
1 Phosphate of lime, 48.51 ; .carbonate of lime, 6.95. 
2 Phosphate of lime, 32.76; carbonate of lime, 4.95. 
(574) 
