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105
Acreage, Population, Private Families and Dwellings.
DEFINITIONS.
PRIVATE FAMILY.—Any person or group of persons included in a separate return as being in separate occupation of any premises or part of premises is treated as a separate family for
Census purposes, lodgers being so treated only when returned as boarding separately and not otherwise. Private families comprise all such families with the exception of those enumerated in
(i) institutions or (ii) business establishments or boarding-houses in which the number of resident trade assistants or resident boarders exceeds the number of members of the employer's or householder's
family (including private domestic servants).
STRUCTURALLY SEPARATE DWELLINGS.—A structurally separate dwelling has been defined for the Census as any room or set of rooms, intended or used for habitation, having
separate access either to the street or to a common landing or staircase. Thus each flat in a block of flats is a separate unit; a private house which has not been structurally subdivided ia
similarly a single unit whether occupied by one family or by several families. But where a private house has been subdivided into maisonettes or portions, each having its front door opening on
to the street or on to a common landing or staircase to which visitors have access, then each such portion is treated as a separate unit.
Where an undivided private house is used partly for business or professional purposes, it is treated as occupied by a private family unless the portion used for non-domestic purposes consists
of at least 3 rooms and is more than one-quarter of the whole. The dwellings shown in this table are those occupied by private families only