Princes of Orange need to learn math, too, and maybe he/they did using this early-mid 1600s math book. While I would definitely admit that math is not my strong suit, I have to say that none of this makes much sense to me.
There is a little explanatory material about the book in French.
Maybe there’s a bit more information on the last page.
If you want to get into the specifics about the Orange lineage, technically whatever prince or very important child used this, they weren’t technically from the original line. It had ended around 100 years earlier with René of Chalon. If you don’t want to a deep dive into the Oranges, then enjoy some painted doodles.
What's in Woodson 
Very interesting! do you know how rice obtained this?
Thank you all your posts!
Based on the embossed Rice Institute in the book, it’s pre-1960. I don’t know more than that.