Wooden and glass copings are also very useful in warding off frosts.
Thick; then succeeded a portion wholly of brick, terminating in battlements topped with copings of stone.
Stone copings are best, but they are costly, and Portland cement is sometimes substituted.
Temporary copings of wood, which may be fixed by means of permanent iron brackets just below the stone coping, are extremely useful in spring for the protection of the blossoms of fruit trees.
These copings should be removed when they are of no further utility as protectors, so that the foliage may have the full benefit of rain and dew.