  We present results on measurements of jet shapes and jet azimuthal
decorrelation from $\overline{p}p$ collisions at $\sqrt{s}=1.8$ TeV using data
collected during the 1992--1993 run of the Fermilab Tevatron. Jets are seen to
narrow both with increasing $E_T$ and increasing rapidity. While HERWIG, a
parton shower Monte Carlo, predicts slightly narrower jets, it describes the
trend of the data well; NLO QCD describes qualitative features of the data but
is sensitive to both renormalization scale and jet definitions. Jet azimuthal
decorrelation has been measured out to five units of pseudorapidity. While
next--to--leading order QCD and a leading--log approximation based on BFKL
resummation fail to reproduce the effect, HERWIG describes the data well.
