Madman,
here is the info on the formamint... GOOGLE to the rescue!!
http://www.sooldsogood.com/showmag.asp?id=1257 copy or click the link and you will get your info. Your bottle must be the same thing but in a liquid.
Madman, how do you find these places?? I found a place to dig behinde an old house once but now I don't know where else to go. I thought about trying an old neighborhood but I am afraid I might get shot. I think you said you were digging at an old dump? I might look into finding one of those.
madman,
looks like you are an experienced digger I can't beleive you have never found a bromo with a ring on the neck! That is what we find all the time.