  We have carried out spectrum calculations with two flavors of dynamical
Kogut-Susskind quarks on four lattice sizes from $8^3\times 24$ to
$16^3\times24$ at couplings that correspond to chiral symmetry restoration for
a lattice with 6 time slices. We estimate that the linear spatial sizes of the
lattices range from 1.8 to 3.6 fm. We find significant finite size effects for
all particles between the smallest and largest volume with the larger quark
mass that we study, $am_q=0.025$, where $a$ is the lattice spacing. The nucleon
experiences the largest effect of about 6 percent. We also study a lighter
quark mass, $am_q=0.0125$, on the two largest lattices. Effects of the
dynamical and valence quark masses on the hadron spectrum are studied both
directly, by comparing the two simulations, and by extracting mass derivatives
from the correlation functions. We do not find much improvement in the nucleon
to rho mass ratio as we decrease the quark mass at this lattice spacing.
Finally, we report on an unsuccessful attempt to see effects of the $\rho
\rightarrow 2\pi$ decay on the $\rho$ mass, and on studies of Wilson and
Kogut-Susskind hadron masses with large valence quark masses. (The paper is
also available via anonymous ftp in a compressed PostScript file:
fuji.physics.indiana.edu:/pub/milc/paper.ps.Z .)
