RARE item - a wonderful original Ropp's Commercial Calculator Book; a very scarce Marked World's Fair Edition - which is an Expo specific edition with Expo information and imagery that would have been distributed during the World's Fair.
Practical Arithmetic for Practical Purposes contains A Complete System of Useful, Accurate Convenient Tables and Simple, Short and Practical Methods. By C. Ropp
Contains the following tables and many more:
Annuities, Board & Rent, Cattle & Hogs, Cordwood, Corn Cribs, Grains, Interest, Lumber, Calendar Weights & Measures, Math Shortcuts.
Measures approx. 3 1/2" x 6" - 144 pages. Pages 129 onward are dedicated specifically to the WCE.
Any questions just ask. Will ship with extra care.
NBP