jca, my joke flew right past you. Thanks for the willingness to share though. I haven't seen kno3 in its pure form at any gardening center around here though, I may have to look around some more. You can easily get nitrate fertilizers from which you can extract kno3, but I haven't seen the pure stuff around. It is like a lot of chemicals. You can't buy nitric acid, sulphuric acid, etc. without a "legitimate" reason, but most things like that can be obtained from easily available materials. The processes probably shouldn't be posted on a public forum (I know there are sites that post the methods, but I don't neccessarily agree with the practice). Suppose some kid reads a "how to" for something nasty, and makes it, and seriously injurs himself? You would feel bad. You have to remember that this forum, while being populated with many thinking, intelligent, and mature adults, is also populated with kids that don't think through all the ramifications of their actions prior to performing said actions.
Sorry about the soap box.