The Annual Reports of the Kodaikanal Observatory, covering the years 1922 to 1971 under the directorship of John Evershed and his successors, present a detailed account of the observatory’s activities and achievements, except for the years 1936, 1938, and 1953. These reports provide valuable insights into the scientific work conducted during this period, documenting significant developments and contributions to astronomy.

Astronomical Observations Madras, 1792–94, also referred to as the Annual Report of 1792, is organized into three sections. The first section describes the Madras Observatory and contains 12 hand-coloured figures, including one depicting the observatory. The second and third sections document astronomical observations made in 1793 and 1794. The volume constitutes an important primary source on the early history of astronomical research at the Madras Observatory.

The "Annual Report on the Madras and Kodaikanal Observatories" covers the years 1860 to 1904, documenting 44 years of scientific activities, observations, and institutional developments. It contains detailed information on infrastructure, instruments, and personnel, together with comprehensive accounts of astronomical and meteorological observations. The report serves as an important source for understanding the advancements and contributions of the Madras and Kodaikanal Observatories during this period.