Scans have been made of ten BHB stars in the globular clusters M92, M13 and M5 and of eight stars in 1 HLF 2 with the multi-channel spectrometer on the Hale 5 meter telescope during July 1979. Twenty-four additional stars are being scanned at CTIO and KPNO using the Harvard scanner. Four-color observations were made of most of the BHB stars on the Steward Observatory 90″ telescope and these measures indicated that there were stars, at the same (b-y) color on the horizontal branch, with quite

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... ferent values of the c1index. The scans confirm these results, showing that the shape of the intensity vs wavelength curve for λ<4210 is related to the c1index. These features are illustrated in the two figures, where it can be seen that a c1value formed from the scans [(u-v)-(v-b)] is greater for the star in Figure 1.