Knowledge Bank

“A multiple traversal absorption cell has been used to obtain spectra of ground level air and various mixtures of $N2$, $CO2$, and $N2O$ over paths ranging from 250 to 700 meters. Comparison of these spectra in the region near 4.5 $\mu$ allows an estimate of the abundance of $N2O$ in ground level air to be made. The values obtained agree with $estimates1$ made from the spectra of ground level air taken by Taylor and $Yates2$ over paths of 10.1 miles, 3.4 miles and 1000 ft. and with values quoted by $Miller.3$”