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

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

1876
Polar clock

Polar clock

1845-1855
Polar clock (Wheatstone type) by J. Soleil

Polar clock (Wheatstone type) by J. Soleil

1845-1855
Differential ratio polariscope by Negretti and Zambra

Differential ratio polariscope by Negretti and Zambra

Polarizing Kaleidoscope, 1867-1868.

Polarizing Kaleidoscope, 1867-1868.

1867-1868
Abbe crystal refractometer by Carl Zeiss, Jena in Germany, 1898

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

1898
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
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
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
Eight mica and selenite discs for Zeiss polariscope

Eight mica and selenite discs for Zeiss polariscope

Wild's polarimeter for the estimation of the amount of sugar in solutions by W. Ladd. with four tubes for holding solutions (one tube has thermometer).

Wild's polarimeter