The museum is open Fridays through Tuesdays 11 a.m. to 4 p.m. Free timed-entry passes are required. Review our latest visitor safety guidelines.

Vertical Sundial by Karl Adzersen

Vertical Sundial by Karl Adzersen

Usage conditions apply
This sundial consists of a thin rectangular brass plate. A hole at the top allows it to be hung. The brass gnomon blade has foliation along one edge. A tab-and-groove holds the gnomon to a brass fleur-de-lis which is screwed to the dial. A sun with an ornate "55" inside it is inscribed on the plate. The rays of the sun point to hour and half-hour marks (calibrated from 1 to 7 and 6 to 12 by 1) around three edges of the plate.
A mark at the top reads: 1732. A signature near the bottom reads: Karl Adzersen. The adjacent place name is illegible.
Currently not on view
Object Name
Sundial, Vertical
date made
Adzersen, Karl
place made
overall: 8 cm x 9.3 cm x 12.1 cm; 3 5/32 in x 3 21/32 in x 4 3/4 in
ID Number
catalog number
accession number
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.


Add a comment about this object