This is one page from one of three books that were apparently from flight school. I can't tell where the instruction took place or when. There are sections on aircraft engines, navigation, communication, and aerodynamics, and lots that I can't read.
Since this website is hosted in Britain, let me say that my grandfather was born in Welver, near Dortmund in 1898. His father was German but his mother was a Scot, so he spoke English with a Scottish accent, called me "Laddie," and loved the bagpipes. After the war he emigrated to Argentina and then the United States where he worked as a civil engineer. Ironically, he worked for the US Army building air bases, including Tachikawa in Occupied Japan, and Tan Son Nhut in Vietnam.
Best wishes,
John