Abstract

I AM glad to have elicited this interesting communication from Dr. Bohr, and I readily admit that the more exact form of his equation given above is in close accordance with the observations of the lines in question. It will be seen that the equation now introduces a modified value for the Rydberg. series ``constant,'' 109675, in addition to its multiplication by 4 for the particular series under consideration. The constant 22779, which is deduced from the wavelengths of the lines is the reciprocal of this modified number, and in the usual numerical form, for oscillation frequencies corrected to vacuum, the equation for the lines would be:-