Overall: 1 3/8 x 16 x 5 1/2 in. ( 3.5 x 40.6 x 14 cm )
stamped: near edge of top: "PALMER & LONGKING / MANUFACTURERS / OF / DAGUERROTYPE / APPARATUS / NEWBURG & NEW YORK"
Rectangular wooden device used in developing photographs; rectangular section is cut out of one end to accommodate 4 1/4 x 5 1/2 inch plate; underside of other end is surfaced with a plate of glass.
Due to ongoing research, information about this object is subject to change.