ON THE PRINCIPLE OF POPULATION; OR, A VIEW OF ITS PAST AND PRESENT EFFECTS ON HUMAN HAPPINESS; WITH AN INQUIRY INTO OUR PROSPECTS RESPECTING THE By T. R. MALTHUS, A. M. LATE FELLOW OF JESUS COLLEGE, CAMBRIDGE. IN TWO VOLUMES. VOL. II. FIRST AMERICAN, FROM THE THIRD LONDON WASHINGTON CITY: PRINTED AND PUBLISHED BY ROGER CHEW WEIGHTMAN. PENNSYLVANIA AVENUE. 1809. CONTENTS CHAP. IX. On the Fruitfulness of Marriages, X. Effects of Epidemics on Registers of Births, Deaths, and Marriages, |