Caleb Saleeby, for example, was a fervent advocate of nudism, heliotherapy, and eugenics (he was Chairman of the National Birthrate Commission and author of a number of books on eugenics).
The following table shows the average birthrate and death-rate per thousand at stated periods.
A birthrate continuously in excess of the death-rate tends to lower the latter through the supply it affords of people annually reaching the more healthy ages.
It may be inferred from the above that a high birthrate does not imply a high rate of increase of population, any more than does a decreasing mortality, but the two rates must be considered in their relations to each other.
The data gathered by the Federal census have never made possible a satisfactory and trustworthy calculation of the birthrate, and state and local agencies possess no such data Birth-rate for any considerable area.
Like all the Australian states, Tasmania shows a decline in the birthrate; in 5905 the births were 5256-36 less than in 1904 - which gives a rate of 29.32 per loco of mean population.
Farr, Vital Statistics (1885); Coghlan, Report on Decline in Birthrate, New South Wales (1903), and report of Royal Commission on that decline (1904); Bonar, Malthus and his Work (1885); Bertillon, Elements de demographie; Gamier, Du Principe de population; de Molinari, Ralentissement du mouvement de la population; Bertheau, Essai sur les lois de la population; Starkenburg, Die BevolkerungsWissenschaft; Stieda, Das sexual Verhdltniss der Geborenen; Rubin and Westergaard, Statistik der Ehen; Westergaard, Die Lehre von der Mortalitdt and Morbilitdt, and Die Grundaage der Theorie der Statistik; Gonnard, L'Emigration europeenne.
The great mortality, especially among the children, is one of the causes of this, the birthrate being also lower than in Russia.