".... Americans dropped stone as a unit of weight, ..."

This sent me to my books- dictionaries, quotations; and through my creaky memory. I don't ever remember hearing stone used as a unit of weight, or reading of the unit in American writing. And American folk songs- I have been collecting books on them- nothing.
I have been living in Canada for 50 years- never heard stone used as a weight although Wackipedia says it is used there (they once used shillings and pence, but dropped them about 1860).
I know Australians and New Zealanders use the stone, why has it disappeared (or is becoming lost) in Canada? Proximity to U. S.?
And in the U. S. and Canada, a hundredweight is 100 pounds.

The unit must have crossed the water, but what happened to it?

H. L. Mencken ("The American Language") calls the stone archaic, and notes that in England for beef on the hoof, a stone is eight pounds, not fourteen as it is for humans. I know it comes from the old 'sack' measure in England, but that doesn't help.

There probably are official dates of adoption on weights in U. S. and Canada but I haven't found them yet. This doesn't answer the question of popular use, when and why, however.

Any suggestions?

(N. b.- Type sizes, e. g. 14-point, etc., apparently vary in England and U. S., this is something else that SI doesn't deal with). And what about octavo, etc.?