The Symposium on Stereology and Quantitative Metallography was presented at the Seventy-fourth Annual Meeting of the American Society for Testing and Materials held in Atlantic City, N. J., 27 June—2 July 1971. Subcommittees 11, 14, and 15 on Electron Microscopy and Diffraction, Quantitative Metallography, and Scanning Microscopy and Microprobe Analysis, respectively, of Committee E04 on Metallography sponsored the symposium. G. E. Pellissier, Ernest F. Fullam, Inc. and S. M. Purdy, Youngstown Sheet and Tube Co., served as cochairmen. Of the ten papers presented at the two sessions, eight are included in this volume.