TIL that I can learn something even from nausea-inducing television. I was watching a program featuring a guy from some EMP "task force." I became curious about the major event c. 1858 that, according to the guest, fried the telegraph system. By following links, I came across the name Loomis, an American mathematician who was interested in astronomy and meteorology. He reported on the phenomenon at that time. Then I looked him up on archive.org and discovered he wrote some mathematics textbooks, which are free to download. So now, after being awakened from my sound sleep by someone playing hip-hop music from their automobile, loud enough to wake the whole neighborhood, I downloaded the Loomis textbooks. Now I'm reviewing cycloids. I honestly was not aware of just how fascinating they are. It seems the Loomis books influenced Chinese mathematics education. I have not learned exactly who is influencing American mathematics education today.