The use of low temperature spectra <i>(1)</i> is likely to become an increasingly important analytical tool. Infrared bands are sharpened considerably and frequently split at liquid-nitrogen temperatures. Luminescent intensities are enhanced, and phosphorescence is frequently measureable only in rigid media at low temperatures. This communication describes a versatile spectral attachment for making low temperature absorption measurements routinely in the infrared, visible, and ultraviolet regions, as well as luminescence measurements in the visible and ultraviolet regions.

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