Hello.  I'm sitting at my computer with a dimebag of what this guy called mescaline.  I'm thinking of doing it, the guy seems trustworthy as far as these sort of people go (not very far), but wouldn't mind making sure first.  It's a standard dimebag, I think he recommended 1/4 dose or something, mixed in water.  Can I test it's purity?  How do you recommend I take it?  Should I take it? 

Thanks