A New Model Refractometer for Determining the Refractive Indices of Gem-Stones, Crystals, and Liquids

Bristow J. Tully

Mineralogical Magazine; September 1927 v. 21; no. 118; p. 324-328; DOI: 10.1180/minmag.1927.021.118.05
© 1927, The Mineralogical Society
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