I can't resist a pretty old math notebook with lots of neatly drawn diagrams, just too pretty, and I fear all that work winding up in the scrap heap. The beautiful hand-marbled covers on this one have come apart from the rest of it, perhaps good now for repurposing, but the pretty blue pages are holding together, and are pretty much full. Many many very lovely pages among them, including one (pictured first) with white paper adhered to the bottom as a correction or addendum. Fairly early 19th c. I believe.

8 1/8" x 6 5/8". 60 pages total, filled  front and back, with 8 blank at the end. Photos are representative. Hand-marbled covers loose, pages holding together.