These are adopted generally for ornament, or in order that the opening of a joint caused by shrinkage may be hidden in the shadow cast by the projection of the bead.
1 The consideration of linings, skirtings, architraves, and the grounds to which they are fixed, does not come within the limits of this course. Some of these are, however, shown in a few of the figures to make them more complete, and to save repeated illustrations when they are described in Part II.
Beads are narrow, convex, plain mouldings;l in section generally parts of a circle.
If the bead is formed in a separate strip, and nailed or bradded 2 to the board, it is described as "laid in" or 'planted" (see Fig. 485).
A Nosing or Bounded Edge is formed by rounding the edge of a piece of stuff, as shown in Fig. 481. It is frequently used for finishing off the edge of a projecting board, such as the tread of a step, a window board, etc.