sundial

Object NamePolarization Sundial with Nicol Prism Polarization Analyzer

Made FromPlate Glass, Mahogany, Metal, Wood, Brass

TechniqueAssembled

SizeSee Individual Records

Accession Number2019.8.8

Curatorial Area(s)

Science and Technology

Physical DescriptionPolarization Sundial with Nicol Prism Polarization Analyzer. (A) Plate glass, mahogany wood, metal mounts; assembled. Polarization sundial constructed of two mahogany frames hinged to the mahogany base. The lower frame holds a black reflecting glass, which raises to 18 degrees to the horizontal and is held by a catch to the upper leaf, which is set to 52 degrees. The upper frame is set with a glass panel set with 15 selenite sections, which measure the direction of polarization of sunlight in the atmosphere (the hour given by the number closest to the selenite showing maximum color). (Ba) Brass Nicol prism analyzer set within a wood mount in a brass tube. (Bbc) Two-part brass tube-shaped case.
Provenance

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