I found this book in the society's collection, C.Y. Moyer's The Business Manual; A Complete Guide in all Mercantile and Legal Transactions and Reference Book for Every Day Use, published by N.G. Hamilton & Co. It has everything from various types of contracts to penmanship, determining how much wallpaper needed for a room and the page I have scanned below on how to determine the capacity of a wagon-box. Very handy indeed!