In the previous post I retracted a statement; now I'm going to apologize.
This blog generates no revenue: which is fine, I hadn't intended it to. However, alongside it I've got a real job, or something sort of like one, and in that part of my life I need to experiment with various Internet features such as Twitter and Google advertising. So I've just inserted Adsense to this blog, as part of my testing process. I'm likely to tweak it this way or that, and I apologize in advance for any aggravation.