Equinoctial Sundial by Lorenz Graszl
Equinoctial Sundial by Lorenz Graszl
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- Description
- This brass universal equinoctial ring dial consists of a meridian (outer) ring, hour (inner) ring, rotating crosspiece or bridge, and sliding suspension ring/handle with two chain links. The meridian ring is calibrated for northern and southern latitudes on both sides from 90 to 0 to 80 by single degrees. The hour ring is calibrated on both sides from I to XII x 2, by I with quarter-hour divisions. There is a pinhole gnomon in the bridge which slides over a calendar scale calibrated by month (in Spanish?) and also marked with the characters of the constellations. Both sides of the meridian ring are engraved with a list of 15 cities and latitudes. One side is marked: "Coppo 25; Copupo 30; Lig 30; Qiullta Sn Jan 32; Valpso Sn Tago 33; Maule 34". The opposite side is marked: "Bucnui Menza 34; Conceptn Chilln 36; S Fee Avco 37; Saldea 40; Chilo 40". These appear to be cities in what is now Chile and Argentina. Another alternate spelling of the maker's name is "Lorenz Grassl"; he worked in Augsburg.
- Location
- Currently not on view
- Object Name
- sundial, equinoctial
- date made
- ca 1770
- ca 1780
- maker
- Graszl, Lorenz
- place made
- Germany: Bavaria, Augsburg
- Measurements
- overall:.4 cm x 10.8 cm x 8.7 cm; 5/32 in x 4 1/4 in x 3 7/16 in
- ID Number
- MA.328737
- catalog number
- 328737
- accession number
- 275687
- Credit Line
- Gift of Mrs. Heloise Durant Seeley
- subject
- Mathematics
- Timekeeping
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Data Source
- National Museum of American History
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