21. IOR/V/18/266 (Sub-series) Reference (shelfmark): IOR/V/18/266 (Sub-series) Title: Tables Containing Results of Meteorological Observations taken at the Madras Observatory, 1796-1821 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1796-1821 Extent: 1 volume
22. IOR/V/18/267 (Sub-series) Reference (shelfmark): IOR/V/18/267 (Sub-series) Title: Meteorological Register kept at the East India Company's Observatory at Madras Collection Area: India Office Records and Private Papers Languages: English Date Range: 1822-1843 Extent: 1 volume
23. IOR/V/18/268-277 Reference (shelfmark): IOR/V/18/268-277 Title: Meteorological Observations made at the East India Company's Observatory at Madras, 1841 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1841-1890 Extent: 10 volumes
24. IOR/V/18/278-280 Reference (shelfmark): IOR/V/18/278-280 Title: Meteorological Observations made at the Meteorological Bungalow on Dodabetta Collection Area: India Office Records and Private Papers Languages: English Date Range: 1847-1855 Extent: 3 volumes
25. IOR/V/18/281-282 Reference (shelfmark): IOR/V/18/281-282 Title: Magnetical Observations made at the East India Company's Observatory at Madras, 1846-1850 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1846-1855 Extent: 2 volumes
26. IOR/V/18/283-291 Reference (shelfmark): IOR/V/18/283-291 Title: Results of Observations of the Fixed Stars made with the Meridian Circle at the Government Observatory, Madras, Collection Area: India Office Records and Private Papers Languages: English Date Range: 1862-1887 Extent: 9 volumes
27. IOR/V/18/292-293 Reference (shelfmark): IOR/V/18/292-293 Title: Meteorological Observations made at the Magnetical and Meteorological Observatory at Simla Collection Area: India Office Records and Private Papers Languages: English Date Range: 1841-1845 Extent: 2 volumes
28. IOR/V/18/294 (Sub-series) Reference (shelfmark): IOR/V/18/294 (Sub-series) Title: Meteorological Observations made at the East India Company's Magnetical Observatory at Singapore Collection Area: India Office Records and Private Papers Languages: English Date Range: 1841-1845 Extent: 1 volume
29. IOR/V/18/295-299 Reference (shelfmark): IOR/V/18/295-299 Title: Kodaikanal Observatory Bulletin, 1908-1912 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1908-1955 Extent: 5 volumes
30. IOR/V/18/300-301 Reference (shelfmark): IOR/V/18/300-301 Title: Kodaikanal Observatory Memoirs Collection Area: India Office Records and Private Papers Languages: English Date Range: 1909-1917 Extent: 2 volumes