New Terms in the Spectrum of Na III

The spectrum of doubly ionized sodium has been excited by an electrodeless discharge. Wave-length measurements have been made in the region from 500 to 2600A. On the basis of these determiniations it has been possible to establish 30 new levels arising from the $2s^{2}2p^{4}3p$, $2s^{2}2p^{4}3d$, and $2s^{2}2p^{4}4s$ configurations.