The Lehmann-Newton-Wu mass matrix, which was recently applied to neutrinos,
is further investigated. The analytic results presented earlier are confirmed
numerically for the solar density profile of the Standard Solar Model. The
combined analysis of atmospheric and solar neutrino data favors the MSW
solution over the vacuum-oscillation solution. The total rates from the solar
neutrino detectors and spectrum distortion reported by the Super-Kamiokande
collaboration for solar neutrinos favors one heavy (m3\sim 0.05 eV) and two
light (m1, m2\lsim 0.003 eV) neutrinos.Comment: 14 pages, LaTeX, including figures. v3: Polishing, reference adde
