Sorry about the delay. I have been busy with all sorts of mundane but important things in the last few days. Hopefully, I'll find some time to post Part II of Lattice Interactions this coming weekend. I know that some of you are impatiently waiting for it. As a preview of what's coming, let me say that I will have something to say about the electron and its so-called magnetic "spin" and how it interacts with the lattice. Hang in there.