As IN OUR 1964 (116) and 1966 (117) jtx. reviews, we continue to use the format established by our predecessors Liebhafsky, Winslow, and Pfeiffer (413). This 1968 review consists of a critical evaluation of new developments and tabular summaries of X-ray spectrography and electron probe microanalysis. Stoddart and Dowden (614) recently compiled a comprehensive bibliography on fluorescent X-ray spectrography.