A transistor doesn't have a "minus" side. It has a base, collector, and emitter. Read up on how a transistor works and you'll understand why the resistors are connected the way they are. And that link that Riva gave will explain in plenty detail how the circuit actually works, how the capacitors work and how they affect the circuit. Google itself might not answer your question directly, however it will give you plenty of references of where you can find the answer.