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remarkable for its medium to large size and excellent condition
American made
Circa 1900-1930
This charge causes the gold leaf to then repel away from the rod
Pre-1850 John Hedley & John Davis mining surveyors equipment
Chinese Needham Type-B Diptych, c.1880-1910 students scope remarkable for its medium toWooden Diptych Sundial, Needham Type B. Chinese made, late 18th early 20th century. Including compass & folding brass gnomon. For use at latitude 35N. Inclination adjustable by hinged strut 12 notches corresponding to 12 solar periods of the year. Table engraved on dial. Intended to be used facing north, & has a compass that allows the user to check their orientation, ensuring the position of the sun is accurately aligned for correct time to be read.
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