This paper develops the concept that the redshift can occur only in
specific discrete values. The key to the development is a dual-redshift
model for individual galaxies. Well-known local galaxies, especially M31
in great detail, are shown to consist of two basic opposed streams of
outflowing material which have an intrinsic difference of redshift of
70-75 km/s. A smooth symmetrical rotation and expansion curve coupled
with the multiple-redshift model is sufficient to account for all the
redshift data. The paper is almost entirely empirical and draws upon
large amounts of the best data available on galaxies. Where definite
differences exist in the form of the data as predicted by conventional
dynamics and the discrete redshift concept, the data favor the latter.