The chemical composition of stars in open clusters provides the best information on the chemical evolution of stars via comparison of the main sequence stars with the evolved giants .
This is a case study of the abundances in the dwarfs and giants in the old , open cluster , NGC 752 .
It is also a pilot program for automated abundance determinations , including equivalent width measurements , stellar parameter determinations , and abundance analysis .
We have found abundances of 31 element-ion combinations in 23 dwarfs and 6 giants .
The mean cluster abundance of Fe is solar with [ Fe/H ] = -0.01 \pm 0.06 with no significant difference between the dwarfs and giants .
We find that the cluster abundances of other elements , including alpha-elements , to be at , or slightly above solar levels .
We find some evidence for CNO processing in the spectra of the giants .
The enhancement of Na in giants indicates that the NeNa cycle has occurred .
The abundances of Mg and Al are similar in the dwarfs and giants indicating that the hotter MgAl cycle has not occurred .
We find no evidence of s-process enhancements in the abundances of heavy elements in the giants .