As a surprise, I added to the very end of Lecture Three a short video of Pete Seeger singing "Which Side Are You On," an old union song. Now it seems some people overseas cannot view the video for that reason because of copyright issues. Who knew? Should I re-edit the video without the Pete Seeger clip and post it? I am afraid that would mean that the lecture would end abruptly. What a downer. I could leave both versions up, perhaps.
Since we are expecting a blizzard here today, that might be an appropriate task for a snow day.