Scientific Instruments
Sundial compass
Smithsonian, Cooper Hewitt, Smithsonian Design Museum. Open access, CC0.

Sundial compass

A folding bone sundial with a small compass: it showed the hour by the sun's shadow once pointed north.

Date
late 17th–early 18th century
Place
Germany
Materials
Bone, brass
Dimensions
H x W x D: 1 x 4 x 5.6 cm (3/8 x 1 9/16 x 2 3/16 in.)
Museum
Cooper Hewitt, Smithsonian Design Museum
Credit line
Given by the estate of Mrs. Lathrop Colgate Harper

Two rectangular pieces of bone, hinged with wire and connected by string, which serves as sun dial indicator. On top, brass disc with combined symbol of Sun, Moon and Wind, surrounded by numerals and pivoting on nail. Two rings of engraved numerals surround it. On inside, circle with six-petaled rosette and radiating lines for hours. Sunk circular area in lower part held compass.

The museum's own record (Smithsonian, Cooper Hewitt, Smithsonian Design Museum)