We first discovered this book in the dusty stacks of the Sterling Memorial Library. The first American book on graphic techniques for businesses, this volume includes stellar examples of how to display quantitative information that still hold up today.
This spread shows how to make a flow chart using a device that sets 1,000 strips of paper on edge to represent 100%. Using clamps and spacers, adjust the chart to represent your quantities, then take your handy photostat and start shooting. Easy, peasy.