Absolute intensity measurements have been made in the ν2fundamental band of nitrous oxide (N2O). The experiments were carried out independently in two laboratories and despite the fact that the two Fourier transform instruments are very different and required different data reduction techniques the results agree within the estimated experimental errors. The square of the transition dipole is found to be 4.7538(58) × 10−3D2and in addition there is a large linear Herman–Wallis factor which gives rise to anRbranch that is significantly stronger than thePbranch.