string-gnomon sundial
Datecirca 1700
Inventory Number7229
ClassificationSundial
Subject
Maker
Johann Martin
1642 - 1721
Cultural Region
Place of Origin
Dimensions1 × 5.2 × 4.6 cm (3/8 × 2 1/16 × 1 13/16 in.)
Material
Accessoriescase
DescriptionThe chapter ring surrounds a magnetic compass on an octagonal brass plate. The gnomon for the dial is hinged to fold flat onto the chapter ring for storage. The chapter ring is marked 4-12-1-8 with 1/2 hour subdivisions. The string gnomon is for latitudes from 51° to 48° in 1° increments. The compass rose is divided into 4 points with every point marked SE, OR, ME, and OC. There are no subdivisions. There is a magnetic declination mark at about 11° west of North.,octagonal
Object Name: Horizontal Dial with adjustable string gnomon and octagonal brass case by Martin
Accessories: Brass fitted case.
Object Name: Horizontal Dial with adjustable string gnomon and octagonal brass case by Martin
Accessories: Brass fitted case.
Signedengraved on backside of dial plate: Johann Martin in Augspurg 48
Inscribedengraved on case cover: BG
Curatorial RemarksAppraisal by Brieux, 9/24/84: $500.
FunctionTime finding at a small range of latitudes after orienting the gnomon to point toward true North.
ProvenanceJoseph Drecker, Aachen, Germany, before 1928 (no. 51); Frederik Casparus Wieder, Noordwijk, The Netherlands, 1928; David P. Wheatland, Topsfield, MA, 1959; gift to CHSI, c. 1987.
Claude Dunod
Date: circa 1725
Accessories: None. Unit is housed in a protective box
Object number: 7120
English
Date: circa 1935
Accessories: Blue cardboard box with instructions printed on a circular paper glued to the interior of the lower half. There is also a slip-in brown leather case.
Object number: 7224
