gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1948.028.200.05 An Improved Polarizing Microscope. III. The Slotted Ocular and the Slotted Objective1 Hallimond A. F. M.A., Sc.D., F.G.S. Museum of Practical Geology, London Taylor E. Wilfred C.B.E., F.R.M.S., F.Inst.P. Messrs. Cooke, Troughton & Simms, Ltd., York

Published by permission of the Director, Geological Survey and Museum.

 3 1948 28 200 296 302 Copyright © 1948, The Mineralogical Society 1948