  We present 10 - 19 um moderate resolution spectra of ten M dwarfs, one L
dwarf, and two T dwarf systems obtained with the Infrared Spectrograph (IRS)
onboard the Spitzer Space Telescope. The IRS allows us to examine molecular
spectroscopic features/lines at moderate spectral resolution in a heretofore
untapped wavelength regime. These R~600 spectra allow for a more detailed
examination of clouds, non-equilibrium chemistry, as well as the molecular
features of H2O, NH3, and other trace molecular species that are the hallmarks
of these objects. A cloud-free model best fits our mid-infrared spectrum of the
T1 dwarf epsilon Indi Ba, and we find that the NH3 feature in epsilon Indi Bb
is best explained by a non-equilibrium abundance due to vertical transport in
its atmosphere. We examined a set of objects (mostly M dwarfs) in multiple
systems to look for evidence of emission features, which might indicate an
atmospheric temperature inversion, as well as trace molecular species; however,
we found no evidence of either.
