Pocket sundial in wood, including compass and folding brass gnomon (about 2 1/2 x 4 3/4-inches overall), China, 1770-1880. For use at latitude 35°N. Inclination adjustable by means of hinged strut - thirteen notches corresponding to thirteen solar periods of the year. Table engraved on dial.
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overall (as displayed): 62 mm x 55 mm x 119 mm,
- pocket sundial
- Dr. H. Chatley
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