MEASURING SPECTRAL TRANSMITTANCE AND REFLECTANCE WITH A MICHELSON $INTERFEROMETER^{\ast}$

$^{\ast}$ This investigation was carried out under a contract between The Air Force Cambridge Research Laboratories and The Ohio State University Research Foundation. $^{1}$ Bell, Sympsoium on Molecular Structure and Spectroscopy Columbus, Ohio, June 15, 1962. $^{2}$ Chamberlin, Gibbs, and Gebbie, Nature 198, 874 (1963). $^{3}$ Steel, J. Opt. Soc. Am. 54, 151 (1964).