of this spectral range for distinguishing stellar spectral types, we define a set of narrow–band indices which, with $ SNR \sim 50$, permit classification of late–type stars on the MK system within $\pm 2$ subclasses. It appears however, that for most applications obtaining H–band spectra at $R \sim 1000$ will be sufficient for classification.

Appendix A: Electronic Availability of the Data
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The final reduced averaged spectra as well as the difference of the forward and backward scan pairs (see Section 3 for description of the reduction procedure) are available through the Astronomical Data Center (ADC) for each observation listed in this paper. The ADC can be contacted directly: i) by post at Astronomical Data Center, NASA Goddard Space Flight Center, Code 631, Greenbelt, MD 20771; or ii) by telephone at (301) 286–8310; or iii) by fax at (301) 286–1771; or iv) via the internet at http://adc.gsfc.nasa.gov. The data are in fits format with pertinent header information included for each image. These fits format files, useful plotting routines, and other relevent information are also available on the World Wide Web at http://donald.phast.umass.edu. The raw FTS data are also available directly from NOAO (contact KHH for details).

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