Imports and exports: (official value.) An account of the rates by which the official valuation of the principal articles imported into England, Scotland, and Ireland, separately is estimated; also, a return of the rates at which foreign and colonial products are valued when exported from England, Scotland, and Ireland, separately and respectively; together with an account of the rates fixed for the official valuation of the principal articles of British and Irish produce and manufactures, exported from England, Scotland, and Ireland, separately and respectively [electronic resource].