Abstract: A slide for use in microscopic studies is comprised of a plurality of coded samples arranged in rows and columns and sandwiched between two glass slides. The samples and the slides are bonded with a clear epoxy cement having an index of refraction equal to 1.54, the index of refraction of quartz.The method of making the slides includes the steps of compacting grain samples in a vial, along with a color-coded epoxy resin, stacking and laminating wafers cut from a number of color-coded samples, cutting the stacked wafers to expose a face of each, bonding the exposed wafer faces to a slide, grinding the bonded wafer to obtain thin samples, covering the thin samples with glass bonded with clear cement.