The item comprises observations notes of the separate results of Madras Meridian Circle Observation by N. R.Pogson in 1864 and 1875.

The item comprises observations notes of the opposition of Mars taken from Madras Observatory by N. R.Pogson from September 22 to October 28 of 1862.

The item contains three pieces of information preserved in a single laminated sheet. The first document is a handwritten address slip of sending some objects from Madras Observatory to the collector of north Arcot Chittoor. The second document is an observation note on the moon eclipse on 22 January 1888. The third one is also notes of observation taken in 1960, 1964, 1969, 1972, and 1975 but the other details need to be recognized.

The item contains data on North declination and South declination corrections from 1874 to 1881 taken from Madras Observatory.

The document contains observation notes about the meantime of planets from 1865 to 1868.

The item contains data on the meantime of the Moon in 1864. Observations result from January to December are tabulated in this note.

The item contains observation notes titled 'approximate places of star reduced to' from 1825 to 1868 by N. R. Pogson. The documents have the observation notes of minor planets: Hestia, Asia, Iris, Europa, Thalia, Alexandra etc.

The item contains observation notes titled 'Madras zone reduced to' from 1825-1867 by N. R. Pogson. The documents have the observation notes of minor planets: Hestia, Sylvia, Sappho, Camilla, Iris, Ariadne, etc.

The note contains an observation of the zodiacal light done by A. A Narayana Ayyar from Solar Physics Observatory, Kodaikanal, in 1916. A. A. Narayana Ayyar was the third Assistant at Kodaikanal Solar Physics Observatory. The observations were tabulated under the headings of date, time, stars on the brightest part of the zodiac, and remarks. Comments were recorded from January 23rd to February 2nd, 1916.

The observation note of Madras Equatorial observations on partial solar eclipse, lunar eclipse, occultation of planets and other astronomical objects. This fond significantly describes the disvoery of several planets, their regular activities, and changes and various astronomical phenomena. From these observations several detections were acrried out through screw detection techniques, interval analysis, and finding mean postitions of various stars.