Band spectrum of manganese oxide (MnO)

New measurements of the wavelengths of the band heads of MnO spectrum have been made. In all 57 band heads, including 15 hitherto unrecorded ones, have been measured. The equation representing the wave-number of a band head has been modified as,

$$\begin{gathered} v = 17949 \cdot 19 + \{ 762 \cdot 75(v' + \tfrac{1}{2}) - 9 \cdot 60(v' + \tfrac{1}{2})^2 + 0 \cdot 06(v' + \tfrac{1}{2})^3 \} \hfill \\ - \{ 839 \cdot 55(v'' + \tfrac{1}{2}) - 4 \cdot 79(v'' + \tfrac{1}{2})^2 \} \hfill \\ \end{gathered} $$