Quantitative absorpance measurements have been made in pure CO₂ and mixtures of CO₂ with N₂ and O₂ in a 10 m White Perkin-Elmer cell. With absorbing paths up to 50 m-atm, results have been obtained from the band head at 2397 cm^-1 to 2575 cm^-1. The continuous absorption, which is due to the extreme tails of the strong lines in the v₃ band centered at 2349 cm^-1, is much less than calculated with the Lorentz line shape. A good fit with the data is obtained with an empirical line-shape which retains the Lorentz pressure dependence but requires a nearly exponential modification of the frequency dependence.