THE FALL OF THE BIRTH-RATE 43 



or two following, and then a relapse to normal. It 

 will be several years before we can tell how things 

 are really going: obviously we cannot expect that a 

 rise of prices so cataclysmic in character as that which 

 place during the war will be accompanied by 

 changes in population falling within the rule shown 

 In the chart of population and prices. The whole 

 situation has been changed. 



REFERENCES. 



1. DUNCAN, J. MATTHEWS. Fecundity, fertility, sterility. Edinburgh, 



1866. Second edition, 1871. 



2. ANSELL, CHARLES. Statistics of families in the upper and proft- 



classes. C. and E. Layton. 1874. 



3. LEWIS, C. J. and J. N. Natality and Fecundity. Edinburgh. 1906. 



IOLME, A. and STEVENSON, T. H. C. "An improved method 

 of calculating birth-rates." Journ. of Hygiene, April and July, 1905. 

 , A. and STEVENSON, T. H. C. "The decline of human 

 fertility in the United Kingdom and other countries as sho\vn by 

 corrected birth-rates." Journ. Stat. Soc. vol. LXIX. 1906, p. 34. 

 6. YULE, G. U. "On the changes in the marriage and birth-rates in 

 England and Wales during the past half-century, \\ith an enquiry 

 as to their probable causes." Ibid. p. 88. 



iERON, D. "On the relation of fertility in man to so> . etc." 



Drapers' Co. Research Memoirs. Dulau and Co., 1906. 



8. I > K. " Some unconsidered factors affecting the birth-rate." 



Journ. Stat. Soc. vol. LXXl. 1008, p. i . 



9. BROWNLEE.J. "Germinal vit.lu\." ft oc. Phil. Soc. Glasgow. 1908. 

 10. DUNLOP, J. C. "The fertility of marriage in Scotland, a Census 



study." Journ. Stat. Soc. vol. -,13-14. p. 259. 



The declining birth-rate es and effects" (Report of the 



Mirth-rate Commit hapman and Hall. 1916. 



(A second report has now been issued: Problems of pnpnlnti 

 parenthood. Chapman and Hall. 1920.) 



T. H . ( fertility of various social classes in 



and and Wales from the middle of the 19th century to 1911." 

 Journ. Stat. Soc. read April, 1920. 



Reference should also be made to the Reports of the Reg. Genl. for 

 1911 and 1912, and Part III of the Decennial Supplement for 1901-10. 

 international comparisons St> V du mouvement 



delapopul i.jusqu'en 1905, 1007; vol. H. 1901-10. n;i3 (Paris 



Statistique gencralc de la France) will be found u- 



