Elements of optical mineralogy; an introduction to microscopic petrography, by Alexander N. Winchell ... Optical mineralogy, Elements of. Winchell, Alexander Newton, 1874-1958. Winchell, N. H. (Newton Horace), 1839-1914. Optical mineralogy. QE367 .W75 1937 549.12 WIE "Part I of the first edition of this work was prepared chiefly by N.H. Winchell ... and parts II and III were prepared by Alexander N. Winchell ... The second edition was entirely rewritten and much enlarged by the present author."--Pref. New York, J. Wiley & sons, inc.; London, Chapman & Hall, limited, 1937- 1937- 1937 Text v. eng