William Stanley JEVONS.

Spelling has been fixed, thanks. I seem to be cursed with this name... last time I wrote about it, I initially put the apostrophe in the wrong place ("jevon's"), and this time I thought I was being so clever getting that fixed. Oh well... and Jewish Farmer below is right--I'm confusing the spelling with John Jeavons of "Grow Biointensive" fame. Consider this a public service announcement:)