Document ID: chunk:federal_register_of_legislation:F2023L00078:reg:2028:p2
Version: federal_register_of_legislation:F2023L00078
Segment Type: reg
Provision Reference: reg 2028 (pt 2/8)
Character Range: 140093–142875

is distinguished from restoration by the introduction of new material.
Related object means an object that contributes to the cultural significance of a place but is not at the place.
Related place means a place that contributes to the cultural significance of another place.
Restoration means returning a place to a known earlier state by removing accretions or by reassembling existing elements without the introduction of new material.
Setting means the immediate and extended environment of a place that is part of or contributes to its cultural significance and distinctive character.
Use means the functions of a place, including the activities and traditional and customary practices that may occur at the place or are dependent on the place.

Appendix 2. Glossary of Historic Lighthouse Terms relevant to Swan Island
A
Apron Paving – concrete paving surround the base of the lighthouse tower.

Astragal – bars which support the glazing of a lantern. They may also support the roof. Simply a framing member between the glazing bars in the lantern glazing. In its true meaning an astragal is a moulding that has a rounded profile. In lanterns this is almost never the case.

B

Balcony – walk way around the outside of the lantern, used for maintenance and (formerly, when lighthouses were staffed) for observing ships. Principal parts are the balcony floor and the balcony balustrade.

Balcony Floor – floor of the balcony. Swan Island's balcony is constructed of slate slab (supported on the tower wall and cornice).
Balcony Balustrade – handrail together with its supports. The supports are called balusters. Simply a railing or wall on the outer perimeter of the balcony, to prevent people from falling off the balcony. Generally made of metal stanchions and rails – Swan Island's balustrade is of welded stainless steel, with angle section stanchions bolted to the balcony floor at the bottom, with four round tubular rails.

Balcony door – door in the lantern base to give access to the balcony. I

Brass – an alloy of copper and zinc, commonly used for corrosion-resistant fixings and plumbing fittings.

Bronze – an alloy of copper and tin.

C

Cast iron – mixture of iron and carbon with a relatively high carbon content and a low melting point, produced directly from a blast furnace.

Chance Bros – English manufacturer of optical apparatus, lanterns, cast iron stairs, cast iron towers, and other lighthouse components. The Chance family established a glass-making business in Smethwick, England in 1824 and is often described as 'near Birmingham'. The business was absorbed into the Pilkington group of companies in 1951 and now ceases to exist.

Character – pattern of flashes of light emitted by a lighthouse, designed to identify that particular lighthouse.