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Polar clock

1845-1855

saccharimeter (polarimeter) for use in sugar refineries by C. Scheibler

1876

Pseudoscope, made by C. D. Ahrens, London, England, c. 1850. Consists of brass supporting stand with small leather case containing two stamped metal discs and cylindrical eyepiece unit

Pseudoscope, made by C. D. Ahrens

1845-1855

Elbow projection polariscope, with six large slides, kaleidoscope slide and accessory slide holder with five slides, by Newton & Co., Fleet Street, London, England, 1890-1900

Elbow projection polariscope, with accessories

1890-1900

Abbe crystal refractometer by Carl Zeiss, Jena in Germany, 1898

Abbe type Crystal Refractometer by Carl Zeiss, Jena, German, 1898

1898

Ladd's Polariscope on iron tripod, with lens and quarter undulations plate, made by William Ladd, London, c.1872

Ladd's Polariscope on iron tripod

1872