Infrared High-Resolution Integrated Light Spectral Analyses of M31
  Globular Clusters from APOGEE
  Chemical abundances are presented for 25 M31 globular clusters (GCs), based
on moderately high resolution (R = 22, 500) H-band integrated light spectra
from the Apache Point Observatory Galactic Evolution Experiment (APOGEE).
Infrared spectra offer lines from new elements, of different strengths, and at
higher excitation potentials compared to the optical. Integrated abundances of
C, N, and O are derived from CO, CN, and OH molecular features, while Fe, Na,
Mg, Al, Si, K, Ca, and Ti abundances are derived from atomic features. These
abundances are compared to previous results from the optical, demonstrating the
validity and value of infrared integrated light analyses. The CNO abundances
are consistent with typical tip of the red giant branch stellar abundances, but
are systematically offset from optical, Lick index abundances. With a few
exceptions, the other abundances agree between the optical and the infrared
within the 1{\sigma} uncertainties. The first integrated K abundances are also
presented, and demonstrate that K tracks the alpha-elements. The combination of
infrared and optical abundances allows better determinations of GC properties,
and enables probes of the multiple populations in extragalactic GCs. In
particular, the integrated effects of the Na/O anticorrelation can be directly
examined for the first time.
