It was in Rome, however, that the system from which the name of the inquiry is derived was first established upon a regular footing. The original census was ascribed to Servius Tullius, and in the constitution which goes by his name it was decreed that every fifth year the population should be enumerated along with the property of each family—land, live-stock, slaves and freedmen. The main object was to ensure the accurate division of the people into the six main classes and their respective centuries, which were based upon considerations of combined numbers and wealth. With the increase of the city the operation grew in importance, and was followed by an official lustrum, or purificatory sacrifice, offered on behalf of the people by the censors or functionaries in charge of the classification. Hence the name of lustrum came to denote the intercensal term, or a period of five years. The word census, too, came to mean the property qualification of the class, as well as the process of registering the resources of the individual. Later, it was used in the sense of the imposition itself, in which it has survived in the contracted form of cess. Unfortunately the statistics of population thus collected were subordinated to the fiscal interests of the inquiry, and no record has been handed down relating to the population of the city and its neighbourhood. In the time of Augustus the census was extended to the whole empire. In the words of the Gospel of St Luke, he ordered “the whole world to be taxed,” or, according to the revised version, to be enrolled. The compilation of the results of this the most comprehensive enumeration till then attempted was engaging the attention of the emperor, it is said, just before his death, but was never completed. The various inquiries instituted during the middle ages, such as the Domesday Book and the Breviary of Charlemagne, were so far on the Roman model that they took little or no account of the population, the feudal system probably rendering information regarding it unnecessary for the purposes of taxation or military service.
The foundations of the census on the modern system were laid in Europe towards the middle or end of the 17th century. Sweden led the way, by making compulsory the parish record of births, deaths and marriages, kept by the clergy, and extending it to include the whole of the domiciled population of the parish. In France, Colbert, in 1670, ordered the extension to the rural communes of the system which had for many years been in force in Paris of registering and periodically publishing the domestic occurrences of the locality. Five years before this, however, a periodical enumeration by families and individuals had been established in the colony of New France, and was continued in Quebec from 1665 till 1754. This, therefore, may be considered to be the earliest of modern censuses.
Efforts have been almost unceasingly made since 1872 by statistical experts in periodical conference to bring about a general understanding, first, as to the subjects which may be considered most likely to be ascertained with approximate accuracy at a census, and secondly—a point of scarcely less importance—as to the form in which the results of the inquiry should be compiled in order to render comparison possible between the facts recorded in the different areas. In regard to the scope of the inquiry, it is recognized that much is practicable in a country where the agency of trained officials is employed throughout the operation which cannot be expected to be adequately recorded where the responsibility for the correctness of the replies is thrown upon the householder. The standard set up by eminent statisticians, therefore, may be taken to represent an ideal, not likely to be attained anywhere under present conditions, but towards which each successive census may be expected to advance. The subjects to which most importance is attached from the international standpoint are age, sex, civil condition, birthplace, illiteracy and certain infirmities. Occupation, too, should be included, but the record of so detailed a subject is usually considered to be better obtained by a special inquiry, rather than by the rough and ready methods of a synchronous enumeration. This course has been adopted in Germany, Belgium and France, and an approach to it is made in the decennial census of Canada and the United States. Religious denomination, another of the general subjects suggested, is of considerably more importance in some countries than in others, and the same may be said of nationality, which is often usefully supplemented by the return of mother-tongue. Nor should it be forgotten that the internal classification and the combinations of the above subjects are also matters to be treated upon some uniform plan, if the full value of the statistics is to be extracted from the raw material. On the whole, the progress towards a general understanding on many, if not most, of the questions here mentioned which has been made in the present generation, is a gratifying tribute to those who have long laboured in the cause of efficient enumeration.
The British Empire
England and Wales.—Up to the beginning of the 19th century the number of the population was a matter of estimate and conjecture. In 1753 a bill was introduced by a private member of the House of Commons, backed by official support, to provide for the annual enumeration of the people and of the persons in receipt of parochial relief. It was violently opposed as “subversive of the last remains of English liberty” and as likely to result in “some public misfortune or an epidemical distemper.” After passing that House, however, the bill was thrown out by the House of Lords. The fear of disclosing to the enemies of England the weakness of the country in fighting-material was one of the main objections offered to the proposal. By the end of the century, however, owing to a great extent to the publication of the essays of Malthus, the pendulum had swung far in the opposite direction, it was thought desirable to possess the means of judging from time to time the relations between an increasing population and the means of subsistence. A census bill, accordingly, again brought in by a private member, became law without opposition at the end of 1800, and the first enumeration under it took place in March of the following year, the operations being confined to Great Britain. The inquiry was entrusted in England to the overseers, acting under the justices of the peace and the high constables, and in Scotland, to village schoolmasters, under the sheriffs. A supplementary statement of births, deaths and marriages for each parish was required from the clergy, who transmitted it to parliament through the bishops and primates successively. There was no central office or control. The schedule required the number of houses, inhabited and otherwise, the population of each family, by sex, and the occupation, under one of the three heads, (a) agriculture, (b) trade, manufacture or industry, or (c) other than these two. The results, which were not satisfactory, were published without comment. Ten years later, the chief alteration in the inquiry was the substitution of the main occupation of the family for that of the individual. The report on this census contained a very valuable exposition of the difficulties involved in such operations and the numerous sources of error latent in an apparently simple set of questions. In 1821 an attempt to get a return of ages was made, but it was not repeated in 1831, when the attention of the enumerators was concentrated upon greater detail in the occupation record. Their efforts were successful in getting a better, but still far from complete result. The creation, in 1834, of poor law unions, and the establishment, in 1836, of civil registration districts, as a rule coterminous with them, provided a new basis for the taking of a census, and the operations in 1841 were made over accordingly to the supervision of the registrar-general and his staff. The inquiry was extended to the sex, age and occupation of every individual; those born in the district were distinguished from others, foreigners being also separately returned. The number of houses inhabited, uninhabited and under construction respectively, was noted in the return. The parish statement of births, deaths and marriages was sent up by the clergy for the last time. The most important innovation, however, was the transfer of the responsibility for filling up the schedule from the overseers to the householders, thereby rendering possible a synchronous record.
With some modification in detail, the system then inaugurated has been since maintained. In 1851 the relationship to the head of the family, civil condition, and the blind and deaf-mute were included in the inquiry. On this occasion, the act providing for the census was interpreted to authorize the collection of details regarding accommodation in places of public worship and the attendance thereat, as well as corresponding information about educational establishments. A separate report was published on the former subject which proved something of a storm centre. The census of 1871 obtained for the first time a return of persons of unsound mind not confined in asylums. During the next ten years, the separate areas for which population returns had to be prepared were seriously multiplied by the creation of sanitary districts, to the number of 966. The necessity, for administrative or other purposes, of tabulating separately the returns for so many cross-divisions of the country constitutes one of the main difficulties of the English census operations, more particularly as the boundaries of these areas are frequently altered. In anticipation of the census of 1891, a treasury committee was appointed to consider the various suggestions made in regard to the form and scope of the inquiry. Its proposals were adopted as to the subdivision of the occupation column into employer, employed and independent worker, and as to the record upon the schedule of the number of rooms occupied by the family, where not more than five. Separate entry was also made of the persons living upon property or resources, but not following any occupation. No action was taken, however, upon the more important recommendation that midway between two censuses a simple enumeration by sex and age should be effected. A return was also prepared in 1891, for Wales, of those who could speak only Welsh, only English, and both languages, but, owing to the inclusion of infants, the results were of little value. In 1901 the same information was called for, excluding all under three years of age. The term tenement, too, was substituted for that of storey, as the subdivision of a house, whilst in addition to inhabited and uninhabited houses, those occupied by day, but not by night, were separately recorded. The nationality of those born abroad, which used to be returned only for British subjects, was called for from all not born within the kingdom.
Scotland.—In the acts relating to the census from 1801 to 1851, provision for the enumeration of Scotland was made with that for England and Wales, allowance being made for the differences in procedure, which mainly concerned the agency to be employed. In 1855, however, civil registration of births and deaths was established in Scotland, and the conduct of the census of 1861 was, by a separate act, entrusted to the registrar-general of that country. The same course was followed at the three succeeding enumerations, but in 1901 the former practice was resumed. The complexity of administrative areas, though far less than in England, was simplified, and the census compilation proportionately facilitated, by the passing of the Local Government Act for Scotland, in 1889. In 1881, the definition of a house in Scotland was made identical with that in England, since previously what was called a house in the northern portion of Great Britain was known as a tenement in the south, and vice versa. Since 1861 a return has been called for in Scotland of the number of rooms with one or more windows, and that of children of school-age under instruction is also included in the inquiry. The number of persons speaking Gaelic was recorded for the first time in 1881. The question was somewhat expanded at the next census, and in 1901 was brought into harmony with the similar inquiry as to Welsh and Manx.
Ireland.—An estimate of the population of Ireland was made as early as 1672, by Sir W. Petty, and another in 1712, in connexion with the hearth-money, but the first attempt to take a regular census was made in 1811, through the Grand Juries. It was not successful, and in 1821 again, the inquiry was considered to be but little more satisfactory. The census of 1831 was better, but the results were considered exaggerated, owing to the system of paying enumerators according to the numbers they returned. The census, therefore, was supplemented by a revisional inquiry three years afterwards, in order to get a good basis for the newly introduced system of public instruction. The completion of the ordnance survey and the establishment of an educated constabulary force brought the operations of 1841 up to the level of those of the sister kingdom. The main difference in procedure between the two inquiries is that in Ireland the schedule is filled in by the enumerator, a member of the constabulary, or, in Dublin, of the metropolitan police, instead of being left to the householder. The tabulation of the returns, again, is carried out at the central office from the original schedule, and not, as in England, from the book into which the former has been copied by the enumerating agency. The inquiry in Ireland is more extensive than that in Great Britain. It includes, for instance, a considerable amount of information regarding holdings and stock. The details of house accommodation are fuller. A column is provided for the degree of education, and another for religious denomination, an addition which has always been successfully resisted in England. This last information was made voluntary in 1881 and the following enumerations without materially affecting the extent of the record. The inquiry as to infirmities, too, is made to extend to those temporarily incapacitated from work, whether at home or in a hospital. There is also a column for the entry of persons speaking the Irish language only or able to speak both that and English. In the report of 1901 for England and Wales (p. 170) a table is given showing, for the three divisions of the United Kingdom, the relative number of persons speaking the ancient languages either exclusively or in addition to English.
British Colonies and Dependencies.—A simultaneous and uniform census of the British empire is an ideal which appeals to many, but its practical advantages are by no means commensurate with the difficulties to be surmounted. Scattered as are the colonies and dependencies over the world, the date found most suitable for the inquiry in the mother country and the temperate regions of the north is the opposite in the tropics and inconvenient at the antipodes. Then, again, as to the scope of the inquiry, the administrative purposes for which information is thus collected vary greatly in the different countries, and the inquiry, too, has to be limited to what the conditions of the locality allow, and the population dealt with is likely to be able and willing to answer. By prearrangement, no doubt, uniformity may be obtained in regard to most of the main statistical facts ascertainable at a census, at all events in the more advanced units of the empire, and proposals to this effect were made by the registrar-general of England and Wales in his report upon the figures for 1901. Previous to that date, the only step towards compilation of the census results of the empire had been a bare statement of area and population, appended without analysis; comparison or comment, to the reports for England and Wales, from the year 1861 onwards. In 1905, however, the returns published in the colonial reports were combined with those of the United Kingdom, and the subjects of house-room, sex, age, civil condition, birthplace, occupation, and, where available, instruction, religion and infirmities, were reviewed as fully as the want of uniformity in the material permitted (Command paper, 2860, 1906). The measures taken by the principal states, colonies and dependencies for the periodical enumeration of their population are set forth below.
Canada.—The first enumeration of what was afterwards called Lower Canada, took place, as above stated, in 1665, and dealt with the legal, or domiciled, population, not with that actually present at the time of the census, a practice still maintained, in contrast to that prevailing in the rest of the empire. The record was by families, and included the sex, age and civil condition of each individual, with a partial return of profession or trade. Later on, the last item was abandoned in favour of a fuller return of agricultural resources, a feature which has remained a prominent part of the inquiry. After the British occupation, a census was taken in 1765 and 1784, and annually from 1824 to 1842, the information asked for differing from time to time. Enumerations were conducted independently by the different states until 1871, when the first federal census was taken of the older parts of the Dominion. Since then, the enumeration has been decennial, except in the case of the more recently colonized territories of Manitoba and the North-West, where an intermediate census was found necessary in 1885-1886. The census of Canada is organized on the plan adopted in the United States rather than in accordance with British practice, and includes much which is the subject of annual returns in the latter country, or is not officially collected at all. The details of deaths in the year preceding the census, for instance, are called for, there being no registration of such occurrences in the rural tracts. In consideration of the large immigrant population again, the birthplace of each parent is recorded, with details as to nationality, naturalization and date of immigration. Occupation is dealt with minutely, in conjunction with temporary unemployment, average wage or salary earned, and other particulars. No less than eleven schedules are employed, most of them relating to details of industries and production. The duty of filling up so comprehensive a return, involving an answer to 561 questions, is not left to the householder, but entrusted to enumerators specially engaged, working under the supervision of the Department of Agriculture. Owing to the sparse population and difficulties of communication in a great part of the dominion, the inquiry, though referred to a single date, is not completed on that day, a month being allowed to the enumerator for the collection of his returns and their revision and transmission to the central office. A special feature in the operations is the provision, necessitated by the record of the legal population, for the inclusion in the local return of the persons temporarily absent on the date of the census, and their adjustment in the general aggregates, a matter to which considerable attention is paid. The very large mass of detail collected at these inquiries entails an unusually long time spent in compilation; the statistics of population, accordingly, are available considerably in advance of those relating to production and industries.