2. Open Sets

Usually in Four--and sometimes in Three--there are to be found in
nearly every vaudeville theatre two different drops, which with
their matching wings [1] form the two common "open sets"--or scenes
composed merely of a rear drop and side wings, and not boxed in.

[1] A _wing_ is a double frame of wood covered with painted canvas
and set to stand as this book will when its covers are opened at
right angles to each other.

_The Wood Set_ consists of a drop painted to represent the interior
of a wood or forest, with wings painted in the same style. It is
used for knock-about acts, clown acts, bicycle acts, animal turns
and other acts that require a deep stage and can play in this sort
of scene.

_The Palace Set_, with its drop and wings, is painted to represent
the interior of a palace. It is used for dancing acts, acrobats
and other acts that require a deep stage and can appropriately
play in a palace scene.

3. The Box Sets

A "box set" is, as the name implies, a set of scenery that is
box-shaped. It represents a room seen through the fourth wall,
which has been removed. Sometimes with a, ceiling-piece, but
almost invariably with "borders"--which are painted canvas strips
hanging in front of the "border-lights" to mask them and keep the