  A chemical abundance analysis is made of two F type high proper motion stars
selected from the {\sc ELODIE} library. We use high resolution (R=42\,000) and
high signal to noise ratio (S/N=103, 36 $-$per$-$pixel) \'echelle spectra from
the {\sc ELODIE} library of HD\,102870 and BD\,+20\,3603, as two representative
F type high proper motion stars, to determine fundamental parameters and
photospheric abundances of 16 chemical elements including slow (s)$-$ and rapid
(r)$-$process elements from Y to Ba. The chemical composition and kinematic
parameters of the stars imply that they belong to different Galactic
populations: we report HD\,102870, an IAU standard radial velocity star, to be
a thin disk star and BD\,+20\,3603, a metal-poor HPM star, to be a halo star.
