The ruler information from the Slide Rule Museum:

A wonderful mid century

This edition has a decorative color and spine

This collectible ironstone plate has amazing period graphics

nice heavy glass with no chips or cracks

Antique Book, Greenleaf's National Arithmetic; 1852 midcentury_cooking The ruler information from theAn antique book, "The National Arithmetic, on the Inductive System; Combining the Analytic and Synthetic Methods, Together with the Cancelling System; Forming a Complete Mercantile Arithmetic" by Benjamin Greenleaf, A. M. The copyright 1852 hardcover book was published by Robert S. Davis & Co. NY.; 360 pages. Fabric covers, with embossed and gilt spine. In good vintage condition, pencil inscription on cover page, pencil writing on back interior pages,