Elemental abundance analyses with DAO spectrograms XXIV. The Mercury Manganese stars upsilon Her, phi Her, and HR 7018

Elemental abundances analyses are performed for the Mercury-Manganese stars v Her, phi Her, and HR 7018 consistent with previous studies of this serie s using spectrograms obtained with Reticon and CCD detectors. Comparisons o f the first two analyses with those performed using coadded photographic pl ates show the general consistency of the derived elemental abundances. For v Her and for phi Her, abundances were newly found for O, and for Al, V, Zn , and Ce, respectively. HR 7018 is discovered to be a single-lined spectros copic binary. Its Sc abundance is the smallest of any class member with der ived abundances and its Sr abundance the largest of any known HgMn star. A correlation analysis of the most complete abundance sets for 20 Hgh In star s shows that the abundances of some elements are correlated with one anothe r and some are functions of the stellar effective temperature.