Comparisons have been made between the average computerized tomography (CT) values for a range of coals and their parameters as measured by proximate and ultimate analysis. The best match was between the CT values and the ash content of the coal. Eight digital reflectance maps have been constructed from the reflectance data supplied by Prof. Alan Davis of Pennsylvania State University. The coals used had previously been examined by CT and the reflectance maps were obtained after cutting and polishing the coal in the plane of the x-ray imaging. Computer routines have been written to reformat the CT and reflectance images on the same scale and also to manipulate the two images by arbitrary translations and quadrants so that pixel by pixel comparisons can be made. For the Lower Kittanning image there is a good match between the major features of the two images and there are some areas of good pixel by pixel matches. 10 figs., 1 tab.