Note 5 — Chapter IX · THE MATHEMATICS OF A DREAM
Reading edition
This division of society made by Everhard is in accordance with that made by Lucien Sanial, one of the statistical authorities of that time. His calculation of the membership of these divisions by occupation, from the United States Census of 1900, is as follows: Plutocratic class, 250,251; Middle class, 8,429,845; and Proletariat class, 20,393,137.