FOOTNOTES:
[216] It is only fair to Liebig to say that when he wrote these words the practically boundless supply of mineral phosphates which we now know to exist in many parts of the world was little dreamt of.
[217] See Appendix, Note I., p. 371.
[218] See Appendix, Note II., p. 371.
[219] See Appendix, Note III., p. 372.
[220] See Appendix, Note IV., p. 372.