Lecture #18.

I watched the first half of lecture #18 and then about 20 minutes of the second half. I also watched about 15 minutes of the second half of lecture #19. I have already watched the first half of lecture #19. If I can completely watch these two lectures today and lecture #20 I will be happy. I would also like have chapters 7 and 8 read in the second term source book by the time I sleep later Sunday morning.