Salt Peter is a magickal sachet powder used to activate a situation to go your way.  Sprinkle a few grains by the doorway of the person that you need to compel while you think the thoughts that you want to accomplish.  It's best used to get people to fall in love with you in matters of relationship and business.  It can also be used to break lovers and business partners apart if invoked in its revised intention.  You drive the seat of your soul with this most powerful magickal power.  It's an Alchemist best hidden secret with endless possibilities.  Your intention is what sparks it's direction and outcome.