Midfeather

Mid´feath`er

1.(Steam Boilers) A vertical water space in a fire box or combustion chamber.

2.(Mining) A support for the center of a tunnel.

midfeather

1. See parting slip. 2. A longitudinal division or partition, as a withe in a chimney or as in a cased frame.

parting slip, midfeather, wagtail

A long thin strip of wood in the box jamb of a cased frame which separates the sash weights from each other; also called a parting strip, parting bead.

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