by the Statute Law Committee, Chronological Table and Index of the Statutes (1878)
“ In a complex subject such as that of Public Health, the enactments admit of successive siftings or classifications, which, if carried into effect with care and patience, reduce the matter to such a form as will greatly facilitate the selection of headings and sub-headings, and the distribution of the groups of references under their respective headings and sub-headings, a distribution on which the excellence of an index greatly depends. The first operation is a very general one. It consists in setting aside by itself all matter extraneous to the main purport of the statute. ”
