What an absolute treasure trove Dave! I have a copy of an astronomy book written in 1910 by the famous astronomer Robert S Ball who was the Patrick Moore of his day. What I always found to be particuarly endearing is the quaint language they used at the time. I looked up Jupiter in the encyclopaedia and it begins....
JUPITER, in astronomy, the largest planet of the solar system his size is so great that it exceeds the collective mass of all the others in the proportion of 5 to 2. He travels in his orbit at a mean distance from the sun exceeding that of the earth 5-2 times or 483,000,000 miles.Notice how planets in those days were always male or female.