Note 2 — Chapter III
Reading edition
According to Professor Leone Levi, the actual sum would be one hundred and thirteen million pounds: but in dealing with estimates such as these, in which absolute accuracy is impossible, it is better, as well as more convenient, to use round numbers. More than nine-tenths of this sum belongs to the income of the classes that pay income-tax. Of the working-class income, not more than two per cent is counted twice over, according to Professor Leone Levi.