[reading: Tristan Needham, "Visual Complex Analysis"]
Somewhere along the way, I seemed to get volunteered to do some concreting in Essex today. I was helping someone who knew what they were doing, so I learnt a few things about how to mix and lay the stuff. The main thing I learnt, though, was this: pay someone else to do it. Mixing 800kg of concrete by hand is hard work; next time, we need to rent a mixereither a machine or a person, don't care as long as it's not me.