Part 6 (1/2)

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66. _Dormer._--A window pierced in a roof and so set as to be vertical, while the roof slopes away from it. Also called a _Gablet_.

67. _Dowel._--A pin or stud in one block, or body, designed to engage with holes in another body to hold them together in alignment.

68. _Drip._--That part of a cornice or sill course A, or other horizontal member which projects beyond the rest, so as to divert water.

69. _Detents._--Recesses to lock or to serve as a stop or holding place.

70. _Extrados._--The exterior curve of an arch, especially the upper curved face A. B is the _Intrados_ or _Soffit_.

71. _Engrailed._--Indented with small concave curves, as the edge of a bordure, bend, or the like.

72. _Facet._--The narrow plain surface, as A, between the fluting of a column.

73. _Fret, Fretwork._--Ornamental work consisting of small fillets, or slats, intersecting each other or bent at right angles. Openwork in relief, when elaborated and minute in all its parts. Hence any minute play of light and shade. A, j.a.panese fretwork. B, Green fret.

74. _Frontal_, also called _Pediment_.--The triangular s.p.a.ce, A, above a door or window.

75. _Frustums._--That part of a solid next the base, formed by cutting off the top; or the part of any solid, as of a cone, pyramid, etc., between two planes, which may either be parallel or inclined to each other.

76. _Fylfat._--A rebated cross used as a secret emblem and worn as an ornament. It is also called _Gammadium_, and more commonly known as _Swastika_.

77. _Gambrel Roof._--A curb roof having the same section in all its parts, with a lower, steeper and longer part. See _Curb Roof_ and distinguish difference.

78. _Gargoyle._--A spout projecting from the roof gutter of a building, often carved grotesquely.

79. _Gudgeon._--A wooden shaft, A, with a socket, B, into which is fitted a casting, C. The casting has a _gudgeon_, D.

[Ill.u.s.tration: _Fig. 80.-Fig. 93._]

80. _Guilloche._--An ornament in the form of two or more bands or strings twisted together or over or through each other.

81. _Half Timbered._--Constructed of a timber frame, having the s.p.a.ces filled in with masonry.

82. _Hammer Beam._--A member of one description of roof truss, called hammer-beam truss, which is so framed as not to have a tie beam at the top of the wall. A is the _hammer beam_, and C the pendant post.

83. _Haunches._--The parts A, A, on each side of the crown of an arch.

Each haunch is from one-half to two-thirds of the half arch.

84. _Header._--A piece of timber, A, fitted between two trimmers, B, B, to hold the ends of the tail beams, C, C.

85. _Hip Roof._--The external angle formed by the meeting of two sloping sides or skirts of a roof which have their wall plates running in different directions.

86. _Hood Molding._--A projecting molding over the head of an arch, as at A, forming the outer-most member of the archivolt.

87. _Inclave._--The border, or borders, having a series of dovetails.

One variation of molding or ornamentation.

88. _Interlacing Arch._--Arches, usually circular, so constructed that their archivolts, A, intersect and seem to be interlaced.