  The absolute grand-total cross section (TCS) for electron scattering from
pyridine, C$_{5}$H$_{5}$N, molecules has been measured at impact energies from
0.6 to 300 eV in the linear electron-transmission experiment. The obtained TCS
energy dependence appears to be typical for targets of high electric dipole
moment; the cross section generally decreases with rising energy, except for
the 3-20 eV range, where a broad enhancement peaked near 8.5 eV is clearly
visible. Below 10 eV, some weak structures which can be attributed to resonant
scattering processes are also discernible. The present TCS energy dependence is
compared with TCS experimental data obtained recently for energies above 13 eV
by Traore Dubuis et al. [26]. The TCS for pyridine has been confronted with TCS
for benzene to search how the replacement of the CH group in the benzene ring
with the nitrogen atom influences the electron scattering process. In addition,
for pyridine and its halogenated derivatives: 2-chloropyridine
[2-C$_{5}$H$_{4}$ClN] and 2-bromopyridine [2-C$_{5}$H$_{4}$BrN], integral
elastic (ECS) and ionization (ICS) cross sections have been calculated at
intermediate and high electron-impact energies within semiempirical approaches.
For pyridine the sum of ECS and ICS is in reasonable agreement with the
measured TCS above 40 eV.
