Title: On Julius Planer's 1861 paper "Notiz über das Cholestearin" in Annalen der Chemie und Pharmacie
Author(s):

A. Trokhymchuk (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 79011 Lviv, Ukraine; Department of Chemistry & Biochemistry, Brigham Young University, Provo 84602, USA)

Brief review of the literature on the history of thermotropic liquid crystal discovery and the role of the observations reported by Julius Planer in his note published almost 150 years ago.

Key words: history of science, cholesteryl chloride, thermotropic cholesteric liquid crystal phase
PACS: 01.65.+g

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