gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1950.029.209.06 An Improved Polarizing Microscope IV.1 The Fedorov Stage (Three-Axis) Hallimond A. F. M.A., Sc.D., F.G.S. Formerly of the Geological Survey and Museum, London.2 Taylor E. Wilfred C.B.E., F.R.M.S., F.Inst.P. Messrs. Cooke, Troughton & Simms Ltd., York.

Parts I–III, Min. Mag., 1946, vol. 27, p. 175; 1947, vol. 28, pp. 96, 230.

Published by permission of the Director.

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