Studies of Mineral Sulpho-Salts: XV. Xanthoconite and Pyrostilpnite1
M. A. Peacock2
Professor of Crystallography and Mineralogy, University of Toronto, Canada
1Contributions to Mineralogy from the Department of Geological Sciences, University of Toronto, 1950, no. 5. No. XIV of this series is by Robinson (1948); no. XIII, by Peacock and Berry (1947), appeared in this Magazine. 2The sad news of Professor Martin Alfred Peacock's sudden death on October 30 was received during the preparation of this number.