Portable Horizontal Sundial


This square horizontal sundial consists of a brass dial and gnomon, a wooden base, and a silver compass inset in the center of the dial. The compass has a needle and four points. The dial is calibrated from 1 to 12 and from 1 to 12 for a total of twenty-four hours. Each hour is divided into eight parts. Inside this calibration, the dial is calibrated again from I to XII with the hour divided into four parts. The gnomon folds up to a vertical position. The dial is screwed to the wooden base in four places. The base is covered with red paper.

Location: Currently not on view

Subject: MathematicsTimekeeping


See more items in: Medicine and Science: Mathematics, Science & Mathematics


Exhibition Location:

Data Source: National Museum of American History

Id Number: MA.330847Accession Number: 305777Catalog Number: 330847

Object Name: sundial

Measurements: overall: 1.5 cm x 8.1 cm x 8.2 cm; 19/32 in x 3 3/16 in x 3 7/32 in

Guid: http://n2t.net/ark:/65665/ng49ca746aa-9a42-704b-e053-15f76fa0b4fa

Record Id: nmah_1215131

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