Elemental abundance analyses with coadded DAO spectrograms: Pt. 6

The elemental abundances of three mercury-manganese stars ν Cancri, ι Coronae Borealis and HR 8349 were found in a manner consistent with previous analyses of this series. As ι CrB is a double-lined spectroscopic binary with a small velocity amplitude for most of its period, its study required determining whether the observed lines were produced in the primary or secondary or both. The derived abundances and effective temperatures were used with those of mercury-manganese stars previously analysed in this series to extend the study of probable correlations between abundances and with effective temperature and surface gravity in accord with radiative diffusion explanations. (author)