Big machines...

....have an enduring appeal.

Meanwhile, going to the dentist does not, but in a way it's always a pleasure because it gets me out of the house first thing, cycling to Portobello.

I've spent the rest of the day figuring out how to use the presentation software Prezi. It proved to be surprisingly tractable and I've cobbled together something quite acceptable for one of my presentations next week.

In other news, I received a really bizarre freedom of information request.