Early 19th Century Large School (Mostly) Math NotebookThe is by far the largest 19th century notebook I've found, almost 15 inches tall, with a heavy, handmade paper cover that makes it feel rather as if it might contain the secrets to the universe! Not so, really but it is chock full of math related information and calculations, from simple multiplication to division of decimals to the rule of three, and lots of word problems relating to miles and forms of measure and commodities of the day, which looks