Cool Stars 14 - Submitted Abstract # 348 This version created on 05 October 2006 Cool Stars Sing the Blues -- The Encore Donald Luttermoser, East Tennessee State University High-dispersion spectra of cool red giant stars in the blue and violet are presented. The spectra were obtained over a six-year time period with the stellar spectrograph of the McMath-Pierce Telescope on Kitt Peak. Both N-type carbon stars and M-type oxygen-rich stars are presented from 3900 to 4600 A, with the M-type stars containing both semiregular and Mira-type variables. The dominant absorption features in these stars at these wavelengths result primarily from neutral metals, especially iron, and the CH and CN diatomic molecules. The Miras also show strong emission lines during some of their pulsation cycle. Many of these emission lines result from fluorescence from the Mg II h & k lines in the UV. For these fluoresced features, comparisons are made between the Miras and the semiregular carbon-rich and oxygen-rich variables. Mg II profiles show a substantial circumstellar (CS) absorption from neutral metals especially Fe I in the Miras and the carbon-rich semiregulars. The oxygen-rich semiregulars show no hint of fluorescence in the optical as would be expected from the appearance of their unobscured Mg II profiles. Strangely, these "fluoresced" lines in the carbon stars show no hint of emission despite the large CS absorption by their "pumps" in the Mg II lines. This poster discusses the reasons for the lack of this fluoresced emission in these stars. ----------------------------------