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As part of an investigation of the integrated absorption intensities of bands attributed to various functional groups, a study was made of the band intensities in the hydrogen-stretching region of aliphatic carboxylic acids in carbon tetrachloride solution. It was found that the total integrated intensity of the band at 2950 K is an additive function of the intensities assigned to the hydrogen-bonded OH and the CH stretching vibrations. The applicable of the results to the study of association in acids will be discussed.