FOOTNOTES:
[221] Since the discovery of the Florida deposits of phosphate, the working of the Canadian mines has been practically abandoned.
[222] See Appendix, p. 381.
[223] These phosphates are now no longer worked.
[224] These deposits were discovered a few years ago; and as they are of considerable extent and high quality, have entirely revolutionised the phosphate market. About 300,000 tons are now annually raised in Florida.