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<p>A continuation of previous work [see Abstract 1912A01687]. Regularities have been previously observed by Paulson and by Kiess and Meggers, consisting of constant frequency differences. These are now shown to form part of a regular series scheme. Narrow triplets, separations 121.5 and 87.0 form series IS-/b m/p/sub i/, 2p/sub i/-/b m/S, and 2p/sub i/-/b m/D. Wide triplets, separations 448.5 and 257.5, give Is-/b mp/sub i/ /, 2/b p/sub i/ /-/b ms/, and 2/b P/sub i/ /-/b md/. Parallel to these last are Is-/b mp/sub i/ / /b k/sub i/ /), (2/b p/sub i/ /-/b k/sub i/ /-/b ms/, and (2/b p/sub i/-k/sub i/ /)-/b md/sub j/ / with separations 379.9 and 233.4. The limits of the series have been calculated from Ritz formulae, and from interseries combination lines. These give for the reso
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