  We have determined lead (Pb) abundances for twelve red giants having [Fe/H]
between -2.1 and -1.3, and its upper-limits for two lower metallicity objects,
as well as the abundances of lanthanum (La) and europium (Eu). The averages of
[Pb/Fe] and [Pb/Eu] are -0.3 and -0.6, respectively, and no clear increase of
these ratios with increasing metallicity is found. The [La/Eu] values are only
slightly higher than that of the r-process component in solar-system material.
Combining the previous studies for globular clusters, these results suggest
little contribution of the s-process to Pb of the field stars studied here,
supporting the estimate of Pb production by the r-process from the solar-system
abundances.
