  We propose a new method for measuring CP violation in neutrino oscillation
experiments. The idea is to isolate the term due to the CP-violating phase out
of the oscillation probability by taking difference between yields of two (or
three) detectors at path-lengths $L = 250 (\frac{E}{1.35 {GeV}}) (\frac{\Delta
m^2}{10^{-2}{eV}^2})^{-1} {km}$ and at $L/3$ (and also at $2L/3$ in the case of
three detectors). We use possible hierarchies in neutrino masses suggested by
the astrophysical and the cosmological observations to motivate the idea and to
examine how the method works.
