[124] See Appendix, Note II., p. 211.
[125] These results, as indeed all soil percentages, are calculated on the soil in a dry condition.
APPENDIX TO CHAPTER V.
NOTE I. (p. 201).
Composition of Apatite (Voelcker).
(Krageröe, Norway.)
| Lime | 52.16 |
| Phosphoric acid | 41.25 |
| Chlorine | 4.10 |
| Fluorine | 1.23 |
| Oxide of iron | 0.29 |
| Alumina | 0.38 |
| Potash and soda | 0.17 |
| Water | 0.42 |
| 100.0 |
Apatite is found in considerable quantities in America, Germany, France, Spain, Hungary, Norway, and Great Britain. According to Rose, apatite is made up of three molecules of tribasic calcium phosphate (Ca(PO4)2), combined with one molecule of calcium fluoride (Ca F2) or one molecule of calcium chloride (CaCl2) respectively.