A Method of Determining the Angular Direction Represented by a Point in the Directions-Image of an Object under the Microscope

John William Evans
Lecturer in Petrology, Imperial College of Science and Technology, and Birkbeck College.

Mineralogical Magazine; November 1916 v. 18; no. 83; p. 52-57; DOI: 10.1180/minmag.1916.018.83.06
© 1916, The Mineralogical Society
Mineralogical Society (www.minersoc.org)