  The aim of this paper is to provide the fundamental parameters and abundances
for a large sample of local clump giants with a high accuracy. The selection of
clump stars for the sample group was made applying a color - absolute magnitude
window to nearby Hipparcos stars. The abundances of carbon and nitrogen were
obtained from molecular synthetic spectrum, the Mg and Na abundances were
derived using the non-LTE approximation. The "classical" models of stellar
evolution without atomic diffusion and rotation-induced mixing were employed.
The atmospheric parameters (Teff, log g, [Fe/H], Vt) and Li, C, N, O, Na, Mg,
Si, Ca and Ni abundances in 177 clump giants of the Galactic disc were
determined. The underabundance of carbon, overabundance of nitrogen and
"normal" abundance of oxygen were detected. A small sodium overabundance was
found. A possibility of a selection of the clump giants based on their chemical
composition and the evolutionary tracks was explored. The theoretical
predictions based on the classical stellar evolution models are in good
agreement with the observed surface variations of the carbon and nitrogen just
after the first dredge-up episode. The giants show the same behavior of the
dependencies of O, Mg, Ca, Si (alpha-elements) and Ni (iron-peak element)
abundances vs. [Fe/H] as dwarfs do. This allows one to use such abundance
ratios to study the chemical and dynamical evolution of the Galaxy.
