Measurements, with a Schüler-tube source and helium standards, of the high series members of Ag I showed the older measurements to be rather poor. A few new lines have been added. No terms of the quartet system nor of the $d^9{s}^2{}_{}{}^2{}_{}{}^{}D$ were found from new arc measurements. The $d^{10}5s{}_{}{}^2{}_{}{}^{}S$ is at 61104.4, which gives an ionizing potential of 7.53 volts.

• Received 29 September 1930

DOI:https://doi.org/10.1103/PhysRev.36.1531