Note 248-3 — Chapter II
John J. (John Joseph) Lalor translation
Bernouilli, Populationistik, 51 ff. Quetelet, Recherches statist. sur le Royaume des Pays-Bas, 1827, 1, 9, and Du Système social, 1848, 176 ff., specially called attention to the important differences in this relation, between the productive and unproductive years of life. Thus it should not be forgotten, when reading of the greater mortality of the poor quarters of Paris, that strangers who are for the most part in the vigorous years of life, live there least of all.