Abstract
Dierential Stromgren uvby photometric ob- servations from the 0.75-m Four College Automated Photoelectric Telescope were obtained for three metallic- line and three Mercury-Manganese stars. None were found to be variable. These sharp-lined stars may not be the best tests for class variability as their polar axes are pointed to- wards the earth. Each presents essentially the same visible hemisphere as it rotates.
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