This lecture was to be about the Earth's atmosphere, its composition and\nstructure, the greenhouse effect, and the primordial atmosphere, but\nabout 2 seconds into the lecture, unbeknownst to me, the battery\ncompartment on my digital voice recorder came open in my pocket. At the\nend of lecture, I took it out of my pocket to turn it off and the\nbattery didn't come with it. Oops! Fail. My apologies, I'll put in\nsome work to prevent a recurrence in future lectures. Recorded live on\n2009 Oct 6 in Room 1005 Smith Laboratory on the Columbus campus of The\nOhio State University.