Chapter 1 #8,9,13,14,15,20,22,26,32,44,45,46
Chapter 2 #5,6,7,10,13,14,18,24,25,26,29,35,39,50,51,56,60,61,
57 (2nd part only: Orientation of the Milky Way relative to the earth's orbit)
Chapter 4 #13,16,21,22,23,24,36,38,42
Chapter 5 #1,6,9(see also 47),13,14,15,19,20,22,25,30,38,43
Chapter 18 #3,4,7,9,12,16,17,18,22,23,26,27,39,42,47
Chapter 19 #4,5,7,8,9,11,15,17,19,23,24,32,41,60,61,64
Chapter 20 #4,12,13,14,15,22,23,26,27,32,52
Chapter 21 #2,5,7,13,15,16,17,20,23,26,32,33
Chapter 22 #11,12,13,15,17,18,19,22,24,28
Chapter 23 #2,4,5,6,14,21,22,23,25
Chapter 24 #2,6,7,9,13,15,20,38
Chapter 25 #3,6,8,15,20,22,23,25,33,44
Chapter 26 #3,9,11,14,16,20,24,27,31,36
Chapter 27 #3,4,12,19,23,24,25
Chapter 28 #3,4,7,17,22,23,28