Nathan Daboll
... that Nathan Daboll wrote the mathematics textbook most commonly used in American schools during the first half of the 19th century?
... that <b id="mwCHg"><a href="./Nathan_Daboll" id="mwCHk" rel="mw:WikiLink" title="Nathan Daboll">Nathan Daboll</a></b> wrote the <a href="./Mathematics" id="mwCHo" rel="mw:WikiLink" title="Mathematics">mathematics</a> <a href="./Textbook" id="mwCHs" rel="mw:WikiLink" title="Textbook">textbook</a> most commonly used in American schools during the first half of the 19th century?