Thanks to Jerry's quiz, I found this; haven't really explore properly yet, but it looks interesting?
http://www.hbci.com/~wenonah/min-def/index.html
Have fun! (or nightmares ..... :D ) Gavin
Good one, Gavin! = Tim
I would make the comment, having only got as far as the section on potassium, that parts of this book does show it's age. Research done since 1943 has led to a much better understanding of the role of K in plant metabolism- hence the development of Tomorite et al. There may be other sections of this book that have been superseded by more recent research too.
Hadn't noticed the date!
But it's given me some useful ideas. = Tim