hexenoate, C~ F, CH&H-CO~ CH~ CF~, Sandwich type cells were used to press out the liquid samples between the rock-salt plates sufficiently thin to yield a the band at 5.67 This is readily accounted sharp ester carbonyl band. The upper spectral curves were for by considering the influence of the CF3 group taken in this way, while the lower curves were taken in a of the alcohol portion, which is independent of the cell of 0.028 cm. thickness. ...