Bowl-Black painted brass, filler plug at side, expansion chamber at base. Inside of bowl painted white with a black painted lubber line. Mounted on knife-edge pivots in aheavy brass gimbal ring which is attached by a heavy metal bracket to a wooden stand. Dims. 13.25" x 7" x 1.25" (33.6 x 17.8 x 3.2cm)
Card- Diameter 7" (17.8cm) Narrow metal vertical card, white with black markings, graduated on inner surface to 1/2 points. Supported on two tubular arms in form of a + , which supply the necessary floatation. Pivot mounted at junction of arms.
Needle- Unsighted but said to be contained in one of the tubular arms.
Pivot-Unsighted. Pivot stem attached to base of bowl carries a pivot which engages in jewej cup carried at the junction of tubular arms.