The end rails have a mortise in them for the tenons on the ends of the foot boards.
The operation of cutting the mortise is called dove-tailing.
The back posts also have a mortise cut in them at the top for the back board as shown.
In order to get these pieces into place, the mortise in the long post must be made 1/2 in.
It is put together, generally by mortise, tenon and cotter, but it has four original screws all made by hand with the file.
The joints may be made with dowels, or the mortise and tenon may be used, as desired.
The projection is called the tenon, and the cavity the mortise.
The mortise for the key is to be placed in the middle of the tenon.
The other is by using a smaller chisel after the mortise has first been bored with the brace and bit.
Set the gauge for the side of the mortise nearest the face edge.
c.1400, "hole or groove in which something is fitted to form a joint," from Old French mortaise (13c.), possibly from Arabic murtazz "fastened," past participle of razza "cut a mortise in." Cf. Spanish mortaja.
mid-15c., from mortise (n.). Related: Mortised; mortising.