A Lead-Grey, Fibrous Mineral from the Binn Valley, Switzerland

R. H. Solly and G. T. Prior1
Keeper of the Mineral Department of the British Museum.
1Communicated by permission of the Trustees of the British Museum.

Mineralogical Magazine; November 1919 v. 18; no. 87; p. 360-362; DOI: 10.1180/minmag.1919.018.87.04
© 1919, The Mineralogical Society
Mineralogical Society (www.minersoc.org)