With an improved grating and instrumentation it has been possible to reinvestigate the 13- to 44 Å regionof the spectrum and obtain cosiderably improved intensities and peak-to-backgroud ratio (P/B). TheK&agr;emission bands of oxygen, nitrogen, and carbon were obtained with extremely good intensities and P/B.The peak intensity for the carbonKband was 24 000 counts/sec with a P/B of 150 for a 1-mA beam currentand a potential of 3500 V. The investigation of theLemission spectra of Cr through Cu has revealed thatthe transition probability for a (d-p) transition is not always greater than that of a (s-p) transition, whenthese transitions involve energy band electrons. It was also found that theLIII/LIIratio is much closer tothe predicted value of 2 than Skinner found. TheMIIMIIIemission bands, and theMINII, III,MIINIlinesof Nb and Mo have been observed for the first time.