[7] Ed. Med. and Surg. Journ., Jan. 1855, p. 50.
[8] Simpson, Obstetric Works, vol. ii. p. 88.
[9] Many of the statistics now presented we have also embodied in a paper upon the decrease of the rate of increase of population now obtaining in Europe and America, read before the American Academy of Arts and Sciences, December 14th, 1858, as a contribution to the Science of Political Economy.
[10] Moreau De Jonnés, Eléments de Statistique, 1856, p. 202.
[11] Journal des Economistes, March and May, 1847.
[12] Edinburgh Review, Jan. 1857, p. 342. Med. Times and Gazette, May, 1857, p. 462.
[13] Lehrbuch der Politischen Oekonomie.
[14] Sur l’Homme et la Developpement de ses Facultés, tome i. ch. 7.
[15] Journal des Economistes, May, 1847.
[16] Mill, Principles of Political Economy, i. p. 343.