This lecture was to be about the Earth's atmosphere, its composition and

structure, the greenhouse effect, and the primordial atmosphere, but

about 2 seconds into the lecture, unbeknownst to me, the battery

compartment on my digital voice recorder came open in my pocket. At the

end of lecture, I took it out of my pocket to turn it off and the

battery didn't come with it. Oops! Fail. My apologies, I'll put in

some work to prevent a recurrence in future lectures. Recorded live on

2009 Oct 6 in Room 1005 Smith Laboratory on the Columbus campus of The

Ohio State University.