This letter was to replying Dr.M. K. Vainu Bappu for telling the improvements required in the spectra for H & K emission.

This letter discusses on the predicted formula about the shifts of the solar lines in agreement with the observed values at the red end of the spectrum.

The letter discusses on the H and K wave-lengths and discusses the recent results that confirm the earlier results, exactly in the case of H and with a difference of 001 with K.

This letter was an acknowledgement for sending pump and bell jar. Evershed mentioned about getting the beautiful series of plates of the Spectrum of the iron arc in air and the centre of Sun's disk. He has written about reproduction of prominence photos the sample of work done by the Roorkee Coy., is suitable the screen used being very fine.

This letter was a discussion regarding displacements of the solar lines towards red are distinctly unfavourable to Einsteins theory.

The letter discusses about the diagram on the article on Monthly Notices does not take account of the shift of the lines at the centre of the Sun's disc, but only the relative shifts between centre and limb.