This is Reply letter to the Director General of Observatories from John Evershed stating the instrumental co

The album includes photographs captured during the installation of the H-alpha telescope at Kodaikanal Observatory in 2014 by an expert team from China. The H-Alpha telescope has a 20 cm doublet objective lens that produces a beam at f/7.9. The telescope creates a full-disk image of the sun using extra optics. The telescope can also be used to magnify a portion of the sun's disc. The album includes all stages of the installation process with the caption and instruments associated with the telescope. Photos of the IIA team with the team who came from China and cultural programme photos are also archived in this album. It was installed during the directorship of P. Sreekumar.

This is a letter to the Chief Secretary to the soul of Madras to bring a notice about construction of astronomical telescopes entirely by indigenous labour

This letter is regarding Calcutta, who had forwarded to Simla a set of sunshine cards received from Kodaikanal. In this letter, it was asked about the explanation of the unsatisfactory marking