The item comprises observations made as Madras Equatorial Observations of transit of Mercury occurred on the 11th and 12th of November 1861 by N.R. Pogson. The document contains observational data and critical notes about the astronomical event. Mercury's transit across the Sun occurs when the planet Mercury passes directly between the Sun and a superior planet.

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 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 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 Madras equatorial observations of the occultation of Venus that occurred in three different dates; 18 July, 1865, 3 November 1872 and 2 may 1875 recorded by N. R Pogson 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.