We present spectroscopy of candidate stellar and substellar members of the young cluster IC 348 .
Using the Florida Multi-Object Imaging Near-Infrared Grism Observational Spectrometer with the 4 meter telescope at Kitt Peak National Observatory , we have obtained multi-object moderate-resolution ( R = 1000 ) J - and H -band spectra of 66 infrared sources ( H = 12 -17 ) toward IC 348 , many of which are difficult to observe spectroscopically at optical wavelengths ( I > 20 ) because they are highly reddened and/or intrinsically cool and red .
We have also observed 19 known cluster members that have optical spectral types available from previous work .
By using these latter sources as the spectral classification standards , we have identified 14 new members of the cluster with types of M2-M6 in the sample of 66 new objects .
Two additional objects exhibit types of > M8.5 , but can not be conclusively classified as either field dwarfs or cluster members with available data .
We have estimated extinctions , luminosities , and effective temperatures for these 16 M-type objects , placed them on the H-R diagram , and used the evolutionary models of Chabrier & Baraffe to estimate their masses .
If the two candidates at > M8.5 are indeed members , they should be among the least massive known brown dwarfs in IC 348 ( M / M _ { \odot } \sim 0.01 ) .