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LONDON: Printed by WILLIAM CLOWES,

Stamford-street.

CONTENTS

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CHAP.

I. Introductory

II. Of the possible Periods of Human Duplication

Table XVI. Shewing the Prolificness required in order to double

a Population in 123 Years.

XVII. In which the preceding one is divided into Sections

of Eight Years, shewing the Annual Proportions of the Mar-

riages, Births, and Deaths, to the existing Population

throughout.

XVIII. Exhibiting the Mean Proportions in a Population

doubling every 124 Years, in which the Births are as about

1 to 12, and the Deaths as 1 to 36.

XIX. Shewing the Progress of a Population doubling

between every 14 and 15 Years.

III. Of the possible Periods of Human Duplication,

continued.

Table XX. Shewing the Progress of a Population in which the

Marriages take place at 20, and all the Married have 8

Children, 4 of whom survive to Marry at the same age, and

become equally prolific : the Infant and unprolific Deaths

omitted throughout, as having no effect on the Rate of

Increase. The Mean Duration of Life being 65 years, and the

proportion of effete Population to the Two Couples with which

the Table commences, 3.

IV. Of the possible Periods of Human Duplication,

concluded

Table XXI. Shewing the Progress of a Population in which the

Marriages take place at 23 ; each having, out of 5,265 Births,

Three which live to Marry, One in the First, and the remainder

in the Fifth and Eighth Years after Marriage; all such sur-

viving to the age of 65; the existing Progenitors of the Two

First Couples being, therefore, 2f Individuals.

XXII. Exhibiting the results of preceding one divided, to

the Year 200, into Sections of 20 Years each, and containing

the presumed Proportion of Unprolific Births throughout,

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CHAP.

Table XXXIII. Exhibiting the Marriages in the most mortal and

most healthful Year of each of the Sections in the foregoing

Table, from Sussmilch.

XIII. Of the Effect of Mortalities on the Number of

Marriages

209

Table XXXIV. Shewing the Effect of Mortalities on the Number

of Marriages in Sweden,

XXXV. Shewing the Effect of Mortalities on the Number

of Marriages in France.

XXXVI. Shewing the Effect of Mortalities on the Number

of Marriages in England.

XIV. Of the Effect of Scarcities on Human Prolificness 224

XV. Of the Effect of Scarcities on Human Prolificness 236

Table XXXVII. Shewing, from the Registers of England, the

Effect of Scarcities on the Prolificness of Marriages.

XXXVIII. Shewing, from the Registers of England, the

Effect of Scarcities on the Prolificness of Marriages,

XXXIX. Shewing, by another Method, from the Registers

of England, the Effect of Scarcities on the Prolificness of

Marriages.

XL. Shewing, by a further Method, from the Registers of

England, the Effect of Scarcities on the Prolificness of

Marriages.

XVI. Of the Effect of Scarcities on Human Prolificness 256

Table XLI. Shewing the Effect of Crops on the Prolificness of the

Marriages of Sweden.

XLII. Shewing the Price of Coru, and the Mortality of

Sweden, from the Years 1821 to 1825, inclusive.

XVII. Of the Effect of the Preventive Check, or the Post-

ponemeut of Marriages, on their Prolificness 265

Table XLIII. Shewing the Effect the Postponement of the Mar-

riages of Females has upon their Annual Prolificness.

XLIV. Shewing the Effect the Postponement of the Mar-

riages of Females has upon the Mortality of their Offspring.

XLV. Shewing the Effect of the Postponement of the Mar-

riages of the Peeresses on their Prolificness, and on the Mor-

tality of their Offspring.

XLVI. Shewing the Effect of the Postponement of the Mar-

riages of the Peeresses on both their Prolificness and the

Preservation of their Offspring,

XLVII. Shewing the Effect of the “Preventive Check”

on the Fecundity of Marriages in England, both in Towns and

the Country at large: also in France, Prussia, and the

Kingdom of the Netherlands,

XVIII. Of the comparative Correctness of Registers, and

on the Continuation of that Increase in Population

which they at present indicate

284

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