On Some Twins of Calcite; and on a Simple Method of Drawing Crystals of Calcite and Other Rhombohedral Crystals, and of Deducing the Relations of Their Symbols

W. J. Lewis
Professor of Mineralogy in the University of Cambridge.

Mineralogical Magazine; April 1908 v. 15; no. 68; p. 62-77; DOI: 10.1180/minmag.1908.015.68.06
© 1908, The Mineralogical Society
Mineralogical Society (www.minersoc.org)